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OptiDrive Advanced Technical Manual

Revision 1.04

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Revision History :

Revision Date Description

01.00 08.06.00 First draft release
01.01 02.08.00 Options and Application Notes added
01.02 23.01.01 AN25 enhanced
01.03 10.12.01 AN26 added
01.04 02.04.02 Application Notes added, Size 6 ratings added

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Contents :

1. Product Overview
1.1 Technology
1.2 Mains supply compatibility
1.3 Markets and applications

2. General Specifications
2.1 Input voltage ranges
2.2 Output Power and Current ratings
2.3 Self Protection features
2.4 Conformance
2.5 Environmental
2.6 Physical Dimensions

3. Design Specifications
3.1 User interface
3.1.1 Keypad
3.1.2 Display
3.1.3 Remote Wand

3.2 Terminals and I/O

3.2.1 Power terminals, earthing and screening
3.2.2 Digital inputs
3.2.3 Analog input
3.2.4 Analog output
3.2.5 Signal terminals overview

4. Parameter definitions and access

4.1 Standard Parameters
4.2 Standard Parameters – detailed description
4.4 Advanced Parameters
4.3 Advanced Parameters – detailed description

5. Fault codes, drive status and diagnostics

6. User options
6.1 Braking resistors
6.2 Mains input filters
6.3 PI controller module

7. Application Notes

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1. Product Overview

1.1 Technology

The Optidrive range consists of a series of products in five physical sizes

designed to provide cost-effective, easy-to-use drives for 3ph induction motors
in the power range 0.37kW to 90kW. The Optidrive employs open loop voltage
and frequency control to regulate the speed of the motor. The digital control is
combined with the latest IGBT power semiconductor technology to give a
compact, robust solution for general purpose drive applications. The product is
designed for ease of use and ease of installation, together with simple
programming and commissioning thereby minimising the overall applied cost of
a drive solution.

1.2 Mains supply compatibility

The Optidrive is designed for direct on-line connection to world-wide supplies.

The single phase units are designed to operate on 220V (200V … 240V) single
or 3 phase supplies, whereas the 400V 3ph units are designed for a voltage
supply in the range 380V … 480V. For more detailed information, see section
2.2

1.3 Markets and Applications

The Optidrive product range is aimed at a broad market where general motor
speed control is required. Real benefits are offered to both low volume end
users and to OEM customers where the ease of use and the innovative
Optiwand significantly reduce commissioning time.

The simple but powerful features render the Optidrive suitable for a wide range
of applications:

• Fan controllers
- Air conditioning systems
- Energy saving
- Refrigeration systems

• Compressors
- Refrigeration systems
- Compressed air supply systems

• Machine tools and metalworking

- Spindles, including high speed spindles
- High speed cutters
- Polishing
- Rapid stop (E-stop)

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• Woodworking applications
- Lathe spindles
- Saw mills - cut and traverse systems
- High speed routers and planers
- Rapid stop (E-stop)

• Conveyors
- Quarry stone transportation
- Aggregate mixing systems
- Packaging industries

• Pumps
- Paper industry
- Water supply industry
- Sewage systems

• P-I control (using optional PI controller and suitable feedback

transducer)
- Load controllers
- Temperature controllers
- Pressure controllers

• IP40 applications (with IP40 Optidrive)

- Control room installations
- Exposed wall mounting applications

• IP65 applications (with IP65 Optidrive)

- Food processing
- Outdoor / exposed installations

• Textile industry
- Multiple motors (spindles) on one drive
- Hi speed spindles

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2. General Specifications

2.1 Input voltage ranges

Depending upon model and power rating, the drives are designed for direct
connection to the following supplies :

Optidrive sizes 1, 2 (220V) :

200V... 240V ± 10%, 1ph or 3ph, 50…60 Hz ± 5%
Optidrive sizes 1, 2, 3, 4, 5 (400V) :
380V... 480V ± 10%, 3ph, 50…60 Hz ± 5%

Those products used with a 3ph supply are designed for a maximum supply
imbalance of 3% between phases. For input supplies which have supply
imbalance greater than 3% (typically the Indian sub- continent & parts of Asia
Pacific including China) we recommend that input line reactors are fitted.

2.2 Output Power and Current ratings

The following table relates power ratings to mechanical drive sizes.

Model Supply (nom) Power rating Output current Size

OD-12037 1ph/3ph, 220V 0.37 kW / 0.5HP 2.3 A 1
OD-12075 1ph/3ph, 220V 0.75 kW / 1HP 4.3 A 1
OD-12150 1ph/3ph, 220V 1.5 kW / 2HP 7.0 A 1

OD-14075 3ph, 400V 0.75 kW / 1HP 2.2 A 1

OD-14150 3ph, 400V 1.5 kW / 2HP 4.1 A 1

OD-22150 1ph/3ph, 220V 1.5 kW / 2HP 7.0 A 2

OD-22220 1ph/3ph, 220V 2.2 kW / 3HP 10.5 A 2

OD-24075 3ph, 400V 0.75 kW / 1HP 2.2A 2

OD-24150 3ph, 400V 1.5 kW / 2HP 4.1 A 2
OD-24220 3ph, 400V 2.2 kW / 3HP 5.8 A 2
OD-24400 3ph, 400V 4.0 kW / 5HP 9.5 A 2

OD-34055 3ph, 400V 5.5 kW / 7.5HP 13 A (18A hvac) 3

OD-34075 3ph, 400V 7.5 kW / 10HP 18 A (25A hvac) 3
OD-34110 3ph, 400V 11 kW / 15HP 25 A (29A hvac) 3
OD-34150 3ph, 400V 15 kW / 20HP 29.5 A 3

OD-44185 3ph, 400V 18.5 kW / 25HP 39 A (46A hvac) 4

OD-44220 3ph, 400V 22 kW / 30HP 46 A (61A hvac) 4
OD-44300 3ph, 400V 30 kW / 40HP 61 A (72A hvac) 4
OD-44370 3ph, 400V 37 kW / 50HP 72 A (88A hvac) 4

OD-54450 3ph, 400V 45 kW / 60HP 90 A (110A hvac) 5

OD-54550 3ph, 400V 55 kW / 75HP 110 A (145A hvac) 5
OD-54750 3ph, 400V 75 kW / 100HP 150 A (180A hvac) 5
OD-54900 3ph, 400V 90 kW / 120HP 180 A 5
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OD-64110 3ph, 400V 110 kW / 145HP 202 A (240A hvac) 6

OD-64132 3ph, 400V 132 kW / 175HP 240 A (300A hvac) 6
OD-64160 3ph, 400V 160 kW / 210HP 300 A 6

2.3 Protection features

The range of drives can detect and shut down in the event of the following fault
conditions arising :

• Phase - Phase short circuit

• Phase - Earth short circuit
• Output phase over-current trip
• Output current thermal overload (I2t)
• Brake resistor short circuit
• Brake resistor thermal overload (I2t)
• Heatsink thermal overload (trip @ 90 °C)
• DC Link Over voltage
• DC Link Under voltage
• External (thermistor) trip
• Serial communications trip

2.4 Conformance

All products conform to the following international standards :

• IEC 664-1 Insulation co-ordination within low voltage systems

• UL 508C Power conversion equipment
• EN 61800-3 Adjustable Speed electrical power drive systems – Part 3
• EN 61000-4 EMC – Generic emissions standard (Industrial level)
• EN 61000-2 EMC – Generic immunity standard (Industrial level)
• Enclosure protection level according to NEMA 250, EN 60529
• Flammability rating according to UL 94

2.5 Environmental

Ambient temperature range - Operational : 0 … 50 °C

Without derating the drive - Storage : -40 °C … 60 °C
Max altitude for rated operation : 1000m
Derating above 1000m : 1% / 100m
Relative Humidity : < 95% (non condensing)
Protection rating : IP20, NEMA 0

2.6 Physical Dimensions

The following dimensions apply to the standard units without mains filter fitted.

Size 1 : 150 x 80 x 135 (L x W x D)

Size 2 : 260 x 100 x 150 (L x W x D)
Size 3 : 260 x 171 x 150 (L x W x D)
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Size 4 : 520 x 340 x 220 (L x W x D)

Size 5 : 1040 x 340 x 275 (L x W x D)

Dimension diagrams :

Optidrive Size #1

155 155

25

80 130

Fixing screws : 2 x M4

Optidrive Size #2

260

25
92 175
100
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Fixing screws : 2 x M4
Optidrive Size #3

25

210 260

25
163 175
171

Fixing screws : 4 x M4

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A range of mains input filters is available as an option for all Optidrives up to

15kW. For 18.5kW and above, the filter is built into the drive. When the filter is
mounted behind the Optidrive (foot mounting), the dimensions are modified as
follows :

Size #1 Optidrive : depth increased by 40mm to 170mm

Size #2 Optidrive : depth increased by 50mm to 225mm
Size #3 Optidrive : depth increased by 50mm to 225mm

In all cases, the electrical specification of the Optidrive / OptiFilter combination

gives the following performance in accordance with EN61000 :

Optidrive sizes #1, #2, #3 :

Class A (industrial / EN61000-4) limits achieved for screened motor
cable up to 25m

Class B (domestic / EN61000-3) limits achieved for screened motor

cable up to 5m

Optidrive sizes #4, #5 (in-built filter) :

Class A (industrial / EN61000-4) limits achieved for screened motor
cable up to 50m

Class B (domestic / EN61000-3) limits achieved for screened motor

cable up to 5m

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3. Design Specifications

3.1 User interface

3.1.1 Keypad

Each Optidrive has a keypad fitted as standard, allowing drive operation and
set up without any additional equipment.

The keypad consists of 5 keys with the following functions :

Start / Run : Enable running of motor

Stop / Reset : Stop motor / Reset trip
Navigate : Press and hold to enter / exit parameter edit mode
Up : Increase Parameter / Value
Down : Decrease Parameter / Value

The Start/Stop buttons on the keypad are disabled when the parameters have
their factory default settings. To enable keypad operation, set P-12 to 1 or 2
(see parameter section).

The Navigate key alone is used to gain access to the parameter edit menu.
Pressing and holding this key allows the user to toggle between the parameter
edit menu and the real time display (where the drive operating status / running
speed is displayed). This key is also used to toggle between the operating
speed and operating current during drive operation.

3.1.2 Display

A standard 6-digit 7-segment display is fitted to each drive to allow drive

operation to be monitored and parameters to be set.

3.1.3 Optiwand

The unique hand-held Optiwand provides a simple method of rapidly

commissioning any number of Optidrives via an optical InfraRed link. The
Optiwand has a large LCD graphics display allowing parameters and operating
information to be displayed clearly and in any one of 12 user selectable
languages. Complete Optidrive settings can be Uploaded into the Optiwand in
< 1s and then transferred to other Optidrives as required. Up to 63 individual
parameter sets can be stored in one Optiwand.

The Optiwand also has an edit mode which allows the user to change any
parameter value and then store the change in the Optiwand. This can be done
without an Optidrive being present.

The IR communications link is compatible with the IR interface on PC’s,

thereby allowing parameters to be transferred to / from any PC.
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3.1.3 OptiStore and Optimouse

The Windows based applications program OptiStore provides the user with a
means of storing complete parameter sets on a PC. These are stored as text
files and can therefore be saved under any Windows compatible filename and
printed out on any standard Windows printer.

Once stored in file format, parameter sets can be attached to E-mail to be sent
to any E-mail destination worldwide. This facilitates a very powerful method for
customer and application support.

In the event of a PC not having an optical port, the Optimouse provides a

solution. The Optimouse plugs into any standard COM port on a PC, effectively
providing that PC with an IrDA compatible optical port.

3.2 Terminals and I/O

3.2.1 Power terminals, earthing and screening

The full range of products have power input at the top of the unit and motor
connection at the bottom. In addition, sizes 2, 3, 4 and 5 have connection for
an external braking resistor next to the motor connections.

The earth connection is available on each corner of the heatsink, thereby

earthing the heatsink and forming a low impedance path between motor earth
and supply earth which by-passes the PCBs.

3.2.2 Digital inputs

Three digital inputs are available. All of these are programmable in terms of
functionality. This functionality is defined by P-19 (see parameter descriptions).

All inputs are galvanically isolated from the drive power stage to 2.5kV. The
inputs are both +ve and -ve logic activated (auto-detected by the Optidrive).
Any digital input will be activated by an input voltage of <8V (-ve logic) or a
voltage of >21V (positive logic). All voltages are referenced to the common 0V
terminals (terminals 1, 7or 9).

All inputs will withstand up to 50V DC without damage.

3.2.3 Analog input

A bipolar 12-bit (4000 step) fully isolated analog input is available. The level of
isolation is 2.5kV from the power stage. This input is used as the speed
reference input, and can be configured as a voltage or current input. The max
response delay of this input is < 8ms, ie within 8ms the drive will respond
completely to any change on the analog input. The input is over-voltage
protected up to 50V.
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When used in bipolar voltage mode (-10V … 10V), the input symmetry is better
than 0.2%.

The analog input format is set using P-16 (see parameter descriptions).
Available settings are 0..10V, 4..20mA, 0..20mA or 20..4mA , 10..0V or
-10..10V.

A 10V, 30mA voltage output is available on terminal 5 to allow the speed

reference to be set using only an external potentiometer (500 Ohms or
greater). The 10V output is short-circuit and over-voltage protected.

3.2.4 Analog output

A single-ended 10-bit (1000 step) analog output with a bandwidth of >100Hz is

available, delivering an output voltage between 0 and 10V. This can be
configured by software to represent either speed or motor current.

In motor speed mode, the output voltage is scaled linearly between 0 and 10V,
representing 0 to maximum speed (as set in P-01)

In motor current mode, the output voltage is scaled linearly between 0 and
10V, where 10V represents 2x rated current, as set in P-08.

The analog output can source up to 20mA and is short circuit / over-voltage
protected.

3.2.5 Signal terminals overview

The signal terminal block has the following signal connections :

• 0V common connect digital inputs to this to activate

• Digital input 1 active low (connect to 0V to activate)
• Digital input 2 active low (connect to 0V to activate)
• Digital input 3 active low (connect to 0V to activate)
• +10V ref out 10V ref for analog input (pot supply +)
• Analog input 0 .. 10V (4 .. 20mA when Iref enable)
• 0V common 0V ref for analog input (pot supply -)
• Analog output 0 .. 10V programmable analog output
• 0V common 0V ref for analog output
• Relay common N.O. relay contact *
• Relay N.O. N.O. relay contact *

* The relay contacts are rated at 250V AC / 30V DC @ 10A

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4. Parameter definitions and access

Accessing and changing parameters is done in an intuitive manner, as

described below :

Normal (real-time) display mode (non parameter edit mode) allows the key
variables listed below to be displayed in real time.

Speed 0 … ±60000 rpm

H Frequency 0 … ±1000 Hz
A Motor current 0 … 100.0 A

The user can scroll between these variables by pressing and releasing the
<Navigate> key within 1s. The scrolling mechanism rolls over from Load back
to speed.

To enter parameter access mode, press the < Navigate > button for approx.
1s. The display changes from indicating operational speed to “P-XX”, where
XX represents the parameter last accessed during the previous commissioning
session. The value of XX can be incremented or decremented using the <up> /
<down> keys. The parameter scrolling mechanism rolls over from the max to
min parameter number and vice versa.

Pressing and releasing the <Navigate> key once more will then display the
current value of the selected parameter. This can then be edited within the
limits of that parameter, unless parameter write access has been disabled (P-
38).

Pressing the <Navigate> key once more toggles back to display the parameter
number in case further editing is required. If the <Navigate> key is held for
approx. 1 second, the display reverts to displaying the real-time values
(speed/freq or current/load). The display will also revert to displaying the
selected real-time value if no buttons are pressed for >20s if P-01 … P-40 are
being accessed, and >60s if P-00 (watch windows) is being accessed.

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The operation of the parameters is illustrated by the following diagram :

REAL-TIME DISPLAY

Press < Navigate> Press < Navigate > key for >1s
key for >1s Or no key activity for >30s

EDIT PARAMETER Press <Navigate> EDIT PARAMETER

NUMBER key VALUE

The parameters are split into standard parameters (eg max / min speed)
accessible in the basic menu and advanced parameters accessible in the
extended menu.

The parameter listings with default and limiting values are shown in the
following tables.

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4.1 Standard parameters

The following list provides an overview of the standard parameter set :

Par Description Range Default

P-01* Max speed limit (Hz or rpm) P-02 to 5*P-09 (max 1000Hz) 50Hz
P-02* Min speed limit (Hz or rpm) 0 to P-01 (max 1000Hz) 0Hz
P-03 Accel ramp time (s) 0.0s … 3000s 5s
P-04 Decel ramp time (s) 0.0s … 3000s 5s
P-05 Stop mode select Ramp to stop / coast to stop Ramp to stop
P-06 V/F characteristic Constant torque / Pump-Fan Const. Torque
P-07 Rapid decel ramp time 0.0s … 25s (disabled when 0.0s) 0.0s
P-08 Motor rated current limit 0 to current rating of drive (Amps) Rated I-Drive
P-09 Motor rated frequency 25 to 1000Hz 50 Hz
P-10 Motor rated speed 0 to 60,000 rpm 0
P-11 Voltage boost 0 .. 25% of max output 3%
P-12 Terminal / Keypad control of 0 : terminal control 0 (terminal)
drive 1 : keypad control (fwd only)
2 : Keypad control (fwd / rev
toggle using start button)
3 : terminal control (IR transmit
master / slave mode enabled)
P-13 Trip log Last four trips stored no fault
P-14 Advanced menu access 0 to 9999 0
code

* If the motor rated speed in rpm has been entered into P-10, parameters P-01, P-02,
P-20 … P-23, P-27 and P-28 are in rpm.

Brief overview :

P-01, P-02 : Max / Min speed limits. Format (Hz / rpm).

P-03, P-04 : Accel / Decel time from 0 to rated frequency (ramp rate) in seconds
P-05 : Preset ramp rate to stop / Ramp to stop with DC inj / coast to stop.
P-06 : V/F characteristic – either V= K.F (linear) or V= K.F2 (for pumps/fans).
P-07 : Fast decel ramp selected on either mains loss (P-05 = 2) or when forward AND
reverse run enable are active (P-19 = 5, 7 or 9).
P-08 : Motor rated current in Amps. Defaults to max rated drive current.
P-09 : Motor rated frequency : 25 to 1000 Hz in 1Hz steps.
P-10 : Motor rated speed : when non-zero, speed related values in rpm
P-11 : Starting boost voltage: 3% default, max 25% of rated voltage
P-12 : Terminal or keypad control of motor start / stop. Setting to “2” allows keypad
mode to be selected with the <Start> button toggling between forward & rev.
P-13 : Fault history log. Most recent 4 trips stored in order of occurrence
P-14 : Access to advanced menu. Default value of “101” can be changed by user
by changing the value in P-37.

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Parameter Zero (P-00)

Parameter zero (P-00) is a special read-only parameter which provides visibility ,a

window, into the internal control functions of the drive, allowing key internal nodes to
be monitored and is intended primarily as a commissioning and diagnostic aid. It is
accessible in the extended parameter set. Any one of these values can be selected
by scrolling between them using the <up> and <down> keys, as in the case of any
other parameter. The currently selected variable is indicated by a single digit number
(0 to 9) on the left hand side of the drive display.

The following internal variables can be monitored using P-00 :

1 Unscaled analog input (from user terminals) %‘age of analog input voltage
2 Speed ref from scaled (P-35) analog input Hz,
3 Pre ramp frequency ref Hz,
4 Post ramp frequency ref Hz,
5 Slip frequency Hz
6 Stator frequency Hz
7 Applied Motor voltage V
8 DC Bus Volts V
9 Thermistor voltage

Display of Slip Frequency

In its factory default state, the Optidrive has slip compensation disabled, since the
rated speed of the motor will not be known to the drive. In this case, P-10 = 0 and
watch window 5 above will be zero in all cases.

Once the motor rated speed in rpm has been entered into P-10, slip compensation is
automatically activated and the instantaneous value of slip will be displayed in watch
window 5. Slip compensation automatically attempts to maintain a constant rotor
speed under varying load conditions by modifying the applied stator frequency as a
function of load current.

Once P-10 has been entered, the real-time display values will also include speed in
rpm in addition to applied motor frequency in Hz and motor current in A.

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4.2 Standard Parameters – detailed description

P-01 Maximum Speed Limit

This parameter sets the upper limiting boundary defining the maximum
frequency (speed) that can be applied to the motor in any mode of operation.

This parameter will be displayed in Hz in the factory default state or whenever

the motor rated speed parameter (P-10) is zero. If the motor rated speed in
rpm has been entered into P-10, this parameter will be displayed in rpm.

Maximum value : 5 x base frequency (ie 5 x P-09)

Minimum value : value of P-02
Default value : 50 Hz

P-02 Minimum Speed Limit

This parameter sets the lower limiting boundary defining the minimum
frequency (speed) that can be applied to the motor in any mode of operation.

This parameter will be displayed in Hz in the factory default state or whenever

the motor rated speed parameter (P-10) is zero. If the motor rated speed in
rpm has been entered into P-10, this parameter will be displayed in rpm.

The speed will only drop below this level after the drive enable signal has been
removed, when the drive will ramp the output frequency to zero.

Maximum value : value of P-01

Minimum value : 0
Default value : 0 Hz

P-03 Acceleration ramp time

This parameter defines the time taken in seconds for the output frequency
(speed) to increase from zero to the rated frequency (speed), as defined in
parameter P-09.

Note that the ramp rate is unaffected by changing either the maximum or
minimum speed limits (P-01, P-02) since the ramp time is related to P-09 and
not P-01 / P-02.

When set to the minimum ramp time of 0s, the output will change to the
requested value within 8ms of the action being requested.

Maximum value : 3000s

Minimum value : 0s
Default value : 5.0 s

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P-04 Deceleration ramp time

This parameter defines the time taken in seconds for the output frequency
(speed) to decrease from the rated frequency (value in P-09) to zero.

Note that the ramp rate in unaffected by changing either the maximum or
minimum speed limits (P-01, P-02) since the ramp time is related to P-09 and
not P-01 / P-02.

When set to the minimum ramp time of 0s, the output will change to the
requested value within 8ms of the action being requested.

Maximum value : 3000s

Minimum value : 0s
Default value : 5.0 s

P-05 Stop mode select

This parameter defines the way in which the motor comes to standstill when
the drive enable signal is removed.

When set to zero (factory default), the drive speed is ramped down to zero
according to the setting of P-04 whenever the drive enable signal is removed.
The drive will only be disabled when the Optidrive output frequency reaches
zero. (Note that DC injection braking can be used to hold zero speed if
required – see parameters P-31 and P-32).
In the event of the mains supply being lost, the Optidrive will automatically
attempt to keep itself operating by braking (regenerating) a rotating motor. The
rate of deceleration is set also by P-04, unless P-07 has been set to a non-
zero value. In this case, the deceleration ramp rate set in P-07 is used.
In general, best performance is achieved when P-07 is somewhat longer than
the normal braking time and is also improved when slip compensation is
activated (whenever the motor rated speed is entered into P-10).

When P-05 is set to 1, coast-to-stop is selected. In this case, the Optidrive

output will be disabled as soon as the enable signal is removed, leaving the
motor to coast down to zero in an uncontrolled fashion.

When P-05 is set to 2, the motor will be ramped down to zero similarly to the
case above where P-05 = 0 whenever the drive enable signal is removed.
When the mains supply is removed, however, the drive will ramp the output
down to zero at the rate defined in P-04 if P-07 = 0, otherwise at the rate
defined in P-07. This allows the motor to be stopped rapidly (a form of
Emergency Stop), independently of the main deceleration ramp time, in the
event of the mains supply being lost.

Maximum value : 2
Minimum value : 0
Default value : 0
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P-06 V/F characteristic select

This parameter defines the rate at which the voltage is applied to the motor as
the output frequency increases. For many applications the required
characteristic is linear (constant torque selected when P-06 = 0), but for fan
and some pump applications, a significant energy saving can be achieved at
lower speeds by selecting the variable torque setting (P-06 = 1).

Maximum value : 1
Minimum value : 0

Default value : 0

P-07 Rapid deceleration ramp rate

The second deceleration ramp can be selected manually or automatically

under certain conditions to effectively provide an independent, rapid stop
facility that can be used in conjunction with an E-Stop. In most cases, this will
be set to a lower value than the standard deceleration ramp rate in P-04

When P-07 = 0, the second deceleration ramp function is disabled.

The second deceleration ramp is activated automatically when P-06 = 0 or 2

and the mains supply is lost / removed. This ramp can also be activated
manually by closing digital inputs 1 and 2 simultaneously when P-19 has been
set to 5, 7 or 9. These inputs would normally be connected to a rapid stop
button and could for example be linked in with an E-Stop function.

Maximum value : 25s

Minimum value : 0.0s

Default value : 0.0s

P-08 Motor rated current

The rated current of the motor to be connected to the Optidrive (as stamped on
the motor rating plate) should be entered into this parameter. This allow the
Optidrive to match its internal motor thermal protection (I x t protection) to the
motor itself. This ensures that the drive will trip on motor overload (I.t-trP)
before any thermal damage results in the motor.

Maximum value : rated current of the Optidrive

Minimum value : 0.25x rated current of the Optidrive

Default value : rated current of the Optidrive

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P-09 Motor rated frequency

The rated frequency of the motor to be connected to the Optidrive (as stamped
on the motor rating plate) should be entered into this parameter. This defines
the frequency at which maximum (rated) output voltage is applied to the motor.
Above this frequency, the voltage is held constant at this maximum value. At
frequencies below the value entered in P-09, the output voltage varies in
accordance with the setting of P-06 (V/F characteristic).
Note that the V/F curve can also be modified using parameters P-26 and P-29,
allowing the user to adapt the V/F curve to suit non-standard motors.

Maximum value : 1000Hz

Minimum value : 25Hz

Default value : 50Hz

P-10 Motor rated speed

The rated speed of the motor (in rpm) to be connected to the Optidrive (as
stamped on the motor rating plate) should be entered into this parameter if it is
required that the Optidrive displays its speed in rpm. When once a value (non-
zero) has been entered into this parameter, the operating speed of the motor in
rpm will be available on the display. The speed related parameters (ie P-01,
P-02, P-20…P-23, P-27, P-28) will also be displayed in rpm when once an rpm
value has been entered into P-10.

In addition to permitting speed to be displayed in rpm, setting P-10 activates

the slip compensation. In this case, the Optidrive will attempt to maintain
constant rotor speed in rpm under varying load conditions. This is done by
internally measuring the load current and adjusting the applied stator
frequency accordingly.

It is possible also to adjust the level of slip compensation applied using the slip
compensation adjustment factor (P-24).

If the user wishes to have speed displayed in rpm without any slip
compensation be applied, the synchronous speed of the motor should be
entered into P-10. This would be for example 3000rpm (2-pole), 1500rpm (4-
pole), or 1000rpm (6-pole) for a 50Hz motor.

Maximum value : 60 x value of P-09 (eg 3000 rpm when P-09 = 50Hz)
Minimum value : 12 x value of P-09 (eg 600 rpm when P-09 = 50Hz)

Default value : 0

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P-11 Voltage boost level

The voltage boost parameter sets the level of voltage that is applied to the
motor at zero output frequency (DC). This is used to ensure that the motor has
sufficient starting torque to accelerate cleanly away from zero.

It may be necessary to increase the level of boost if operation at low speeds is

required, or if the load connected to the motor needs a particularly large
starting torque. If operation at very low speed for long periods of time is
required, this parameter should be used with some caution, as large values of
voltage boost can cause excessive heating in the motor at low speed. This is
due to the fact that the fan connected to the rotor is virtually ineffective at low
speed and little or no cooling of the motor results.

The effect of the voltage boost decreases linearly from the specified value at
0Hz to zero at half rated frequency (25Hz with a 50Hz motor). This approach
gives a smoother transition from maximum to zero boost as output frequency
increases.

Maximum value : 25% of rated motor voltage

Minimum value : 0
Default value : 3% of motor rated voltage

P-12 Terminal / Keypad mode select

This parameter allows the user to define whether the Optidrive should be
controlled from the User terminal connector (factory default setting) or from the
push-buttons on the front of the keypad.

When P-12 = 0, terminal control mode is selected. In this case, the drive speed
will be controlled either using switches and / or a potentiometer. The function
of the digital inputs can be defined using P-19.

When P-12 = 1, keypad mode is selected. In this case, the speed of the motor
is controlled using the keys on the Optidrive keypad. The <START> and
<STOP> buttons will enable and disable the Optidrive output respectively.
When enabled, the speed of the Optidrive can be ramped up and down using
the <UP> and <DOWN> buttons. If remote keypad operation is required,
<START>, <STOP>, <UP> and <DOWN> keys can be mounted on the front of
a panel and connected electrically to the digital inputs. See Application Note
AN21 for further details. If the Optidrive is stopped whilst running at a particular
speed, it will return to that same speed when re-enabled (pushing the
<START> button.
Note that the Optidrive must have the hardware enable signal applied (digital
input 1 closed) before keypad operation is possible.
When P-12 = 1, only forward (positive) speeds are possible and a reversal in
direction cannot occur.

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When P-12 = 2, the same functionality as above is achieved except for the fact
that reverse operation is possible. In this case, the <START> button doubles
up as a reverse “toggle” button. Each press of the <START> button will cause
a reversal in direction. After having been stopped, the Optidrive will always
start in a positive speed direction. This ensures that there is no ambiguity as to
which direction the motor will start in.

Note that when the Optidrive is to be controlled remotely from the Optiwand (or
via the optical link from some other controller), the Optidrive must be in keypad
mode. The keypad on the Optiwand then operates exactly like the keypad on
the Optidrive.

When P-12 = 3, terminal mode is enabled exactly as when P-12 = 0. In this

case, however, Master mode (for Master / Slave operation) is also enabled.
The Optidrive will now transmit its speed reference signal continuously via the
IR link. Any number of slave Optidrives can then be connected optically with
the Master Optidrive using the OptiLink (see Application Note AN24 for details)
Since the slave Optidrives receive their speed reference via the optical IR
communications port, these must be in keypad mode (P-12 = 1 or 2) to
function correctly. Note that the speed of each slave Optidrive can be scaled
independently with respect to the Master Optidrive.

P-13 Event and Trip log

This parameter holds a record of the most recent four trips and / or events that
have occurred. Each trip will be displayed in abbreviated text, with the most
recent trip being displayed first (on entering into the value of P-13).

Whenever a new trip occurs, this is entered at the top of the list and the other
trips move down. The oldest trip will then be removed from the trip log.

Note that if the most recent trip in the trip log is an “Under-voltage” trip, further
Under-voltage trips will not be entered into the trip log. This is ensure that the
trip log does not fill up with Under-voltage trips which naturally occur every
time the Optidrive is turned off.

See section 5 for detailed descriptions of the trip codes.

P-14 Advanced access code

This parameter allows the user to gain access to the extended parameter set
(P-15 to P-40). Access is allowed when the value entered into P-14 is equal to
the value held in P-37. In its factory default state, P-14 must be set to “101” in
order to gain access to the extended menu.

If access to the extended menu is to be denied (for example where the

parameters have been locked – see P-38), P-37 can be set to a user defined

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value. Access to the extended menu will only be permitted when this user
defined value is entered into P-14.

Maximum value : 9999

Minimum value : 0

Default value : 0

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4.3 Advanced parameters

The following list describes the advanced parameter set :

Par Description Range Default

P-15 Motor rated voltage 220V Optidrive : 40V to 250V 0 for 220V
400V Optidrive : 40V to 500V 400V for 400V
P-16 Analog input V /mA 0-10V, 4-20mA, 0-20mA, 20-4mA, 0-10V
10-0V, -10-10V
P-17 Switching frequency 8, 16, 32 kHz for 220V units 16 kHz for 220V
8, 16 kHz for 400V Size #2 Optidrives, 8kHz
4, 8 kHz for 400V Size #3…#6 for 400V units
P-18 Relay output function 0 : Optidrive Enabled 0
1 : Drive healthy (not tripped)
2 : Motor at set speed
3 : Motor at zero speed
4 : Motor at max speed (P-01)
5 : Motor current overload
P-19 Digital inputs function select 0 to 12, See following table 0
P-20* Preset speed 1 P-02 (min) to P-01 (max) 50Hz / 1440 rpm
P-21* Preset speed 2 P-02 (min) to P-01 (max) 0 Hz / rpm
P-22* Preset speed 3 P-02 (min) to P-01 (max) 0 Hz / rpm
P-23* Preset speed 4 P-02 (min) to P-01 (max) 0 Hz / rpm
P-24 Slip compensation correction 20% … 250% 100%
factor
P-25 Analog output function select (Analog) 0 : Motor Speed 0
(Analog) 1 : Motor Current
(Digital) 2 : Drive enabled
(Digital) 3 : Motor at set speed
P-26 V/F characteristic adjustment 20% … 250% 100%
factor
P-27* Skip freq / speed P-02 (min) to P-01 (max) 0 (inactive)
P-28* Skip freq / speed band 0 to 100% of base freq (P-09) 0 Hz / rpm
P-29 V/F characteristic adjustment 0 Hz to base frequency (P-09). 0 Hz
frequency Function disabled when set to 0.
P-30 Drive start mode 0 to 4 0
P-31 DC injection voltage 0.1 to 20% 10%
P-32 DC injection braking time (s) 0 to 250s 2s
P-33 DC injection on enable 0: Disable, 1: Enable 0
P-34 Brake resistor enable 0 : Disable 1, 2 : Enable 0
P-35 Analog input scaling factor 1% to 500% 100%
P-36 Drive address (s-comms) 0 to 63 0
P-37 Access code definition 0 to 9999 101
P-38 Parameter access lock 0 : All parameters can be 0 (write access
changed and are auto- and auto-save
saved on power down enabled)
1 : Parameter changes not
saved on power down
2 : Parameter read-only access.
No changes allowed.
P-39 Hours run meter 0 to 99999 hours Read only
P-40 Software checksum 0000 to FFFF (hex) Read only

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Notes :

• To restore factory default parameters, hold <up>, <down> and <stop> keys
simultaneously for >1s. This will also reset the access code, but will not affect the
Hours run meter. The hours run meter cannot be reset or changed.

• Pressing the <up> and <down> keys simultaneously in parameter edit mode
resets the selected parameter number / value to zero (or the minimum value as
defined by the limits for that parameter).

Brief overview :

P-15 : Motor rated voltage : Enter the motor rated (nameplate) voltage into this
parameter.
P-16 : Analog input format : volts or mA (0-10V, 4-20mA, 0-20mA, 20-4mA, 10-0V
or –10..10V)
P-17 : Power stage switching frequency. 8kHz, 16kHz or 32kHz selectable
P-18 : Relay output function : Contacts closed if selected condition true.
P-19 : Defines function of digital inputs. (also influenced by P-16, see P-19 table)
P-20, P-21, P-22, P-23 : Define preset speeds 1, 2, 3, 4 respectively.
P-24 : Slip compensation trim factor. The internally calculated value will be scaled by
the percentage value specified in this parameter. Range is 20% to 250%
P-25 : Analog output function select . Analog: 0: speed, 1: current
Digital : 2: Drive enabled, 3: Motor at set speed
P-26 : V/F adjustment level. Motor voltage adjusted by this %age value at the
frequency specified in P-29
P-27, P-28 : Skip speed/frequency and band through which speed reference may
pass but not stop in.
P-29 : V/F adjustment frequency. Motor voltage adjusted by the %age value specified
in P-26 at the frequency specified in P-29.
P-30 : Defines how many times drive will attempt an auto-restart after a trip. The
interval delay between restart attempts is 10s.
P-31, P-32 : If P-05 = 0 or 2 (ramp to zero), these parameters set the duration and
level for DC braking which is applied when the ramp reaches zero.
P-33 : Activates DC injection braking on enable
P-34 : Braking resistor control. When zero, brake resistor is disabled.
P-35 : Permits analog input voltage to be scaled up / down. Range 0.2x to 5x.
P-36 : Distinct drive address for paralleled serial comms via IR link (communications
disabled when P-36 = 0)
P-37 : Allows advanced menu access code (as entered in P-14) to be changed.
P-38 : Enables / disables parameter modification and whether or not parameter
changes are permanently saved.
P-39 : Hours run meter. Read only parameter indicating hours of drive operation.
P-40 : Drive type identification and software checksum. Allows exact s/w version to be
determined

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4.4 Advanced parameters – detailed description

P-15 Motor rated voltage

This parameter allows the user to scale the applied motor voltage such that the
value set in P-15 is reached when the output frequency reaches rated
frequency (as set in P-09). It is therefore possible to run a 220V motor correctly
when the Optidrive has a 400V supply.

In addition, when P-15 has a non-zero value, voltage compensation is

activated. This ensures that the output voltage is controlled correctly
independent of supply voltage and/or in internal DC bus voltage which may
vary significantly during deceleration.

When this parameter is set to zero, the output voltage will vary with input
voltage and during deceleration. The significant increase in motor voltage
during deceleration will increase motor current and motor losses, which may
mean that less (or no) braking resistors are needed.

Maximum value : 500V

Minimum value : 40V
Default value : 0 (disabled) for 230V Optidrives, 400V for 400V Optidrives

P-16 Analog input format (V / mA)

This parameter allows the user to configure the analog input to suit the format
of the signal connected to the analog input. The following formats are
supported :

Voltage 0..10V, 10..0V, -10..10V

Current 4..20mA, 0..20mA, 20..4mA

When configured for one of the voltage input formats, the analog input accepts
bipolar input voltages in the range -10V..10V. When set to 0..10V or 10..0V, all
negative voltages will give zero speed. When set to -10..10V, all negative
voltages will result in the drive running with negative speeds, where the speed
is proportional to the magnitude of the input voltage.

All current input formats are unipolar. When 4..20mA or 20..4mA is selected,
the Optidrive will automatically trip when the input current falls below 2mA.
This is especially important for the inverse (20..4mA) setting where the drive
would otherwise give maximum output speed if the current input was to be
interrupted.

The analog input format can be switched using digital input 3 when P-19 = 0. A
voltage input format will be selected when the input is open, otherwise a
current input format is selected. This allows switching between a local (voltage)
signal and a remote (current) signal.

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P-17 Effective switching frequency

This parameter allows the user to select the drive output switching frequency
to cater for different application requirements.

All 400V products are shipped with the effective output switching frequency set
to 8kHz. This minimises the thermal losses in the Optidrive which therefore
runs cooler. When operating at a particular switching frequency, there will be
an associated acoustic noise produced by the motor at that particular switching
frequency. In most industrial applications (400V supplies), this is of little
consequence as backgroung noise is much greater.
However, domestic (220V) applications tend to be in quieter environments
where acoustic noise is important. For this reason, all 220V Optidrives are set
to 16kHz in the factory default state.

P-18 Relay output function

This parameter allows the user to select under what operating conditions the
output user relay contacts are closed. The following settings are available :

P-18 = 0 : Relay contacts closed when drive output is enabled

P-18 = 1 : Relay contacts closed when drive is healthy (no trip)
P-18 = 2 : Relay contacts closed when the output frequency is within
0.25Hz of the target (requested) frequency.
P-18 = 3 : Relay contacts closed when the output frequency is greater than
„zero frequency“ (5% x P-09, ie 5% of base frequency)
P-18 = 4 : Relay contacts closed when the output frequency reaches the
maximum (P-01) frequency.
P-18 = 5 : Relay contacts closed when the motor output current is greater
than the continuous rated current (as specified in P-08)

Default value : 1 (drive healthy)

P-19 Digital inputs function select

The functionality of the digital inputs within the Optidrive is user programmable,
allowing the user to select the functions required for the application.

Options include : selection between preset speeds, analog input (voltage /

current), external thermistor input, forwards / reverse,
push-button operation.

The following table defines the functions of the digital inputs depending of the
value of parameter P-19 (Digital input function select).

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P-19 Digi input 1 function Digi input 2 function Digi input 3 function
0 Open : Stop (Disable) Open : Analog input Volts / Current analog input
Closed : Run (Enable) Closed : Speed Preset 1
1 Open : Stop (Disable) Open : Analog input Open : Speed Preset 1
Closed : Run (Enable) Closed : Speed Preset 1/2 Closed : Speed Preset 2
(Digi input 3 selects)
2 Open : Stop (Disable) Digital input 2 : open \
è Selects Speed Preset 1
Closed : Run (Enable) Digital input 3 : open /
Digital input 3 : open \
è Selects Speed Preset 2
Digital input 2 : closed /
Digital input 3 : closed \
è Selects Speed Preset 3
Digital input 2 : open /
Digital input 3 : closed \
è Selects Speed Preset 4
Digital input 2 : closed /
3 Open : Stop (Disable) External trip input Open : Analog Input
Closed : Run (Enable) Open : trip, Closed : OK Closed : Speed Preset 1
4 Open : Stop (Disable) Open : Forward Open : Analog Input
Closed : Run (Enable) Closed : Reverse Closed : Speed Preset 1
5 Open : Stop (Disable) Open : Stop (Disable) Open : Analog Input
Closed : Fwd Enable Closed : Reverse Enable Closed : Speed Preset 1
6 Open : Stop (Disable) Open : Forward External trip input
Closed : Run (Enable) Closed : Reverse Open : trip, Closed : OK
7 Open : Stop (Disable) Open : Stop (Disable) External trip input
Closed : Fwd Enable Closed : Reverse Enable Open : trip, Closed : OK
8 Open : Stop (Disable) Open : Forward Open : Speed Preset 1
Closed : Run (Enable) Closed : Reverse Closed : Speed Preset 2
9 Open : Stop (Disable) Open : Stop (Disable) Open : Speed Preset 1
Closed : Fwd Enable Closed : Reverse Enable Closed : Speed Preset 2
10 Normally Open (N.O.) Normally Closed (N.C.) Open : Analog Input
Momentarily Close to run Momentarily Open to stop Closed : Speed Preset 1
11 Normally Open (N.O.) Normally Closed (N.C.) Normally Open (N.O.)
Push to run forwards Momentarily Open to stop Push to run reverse
12 Open : Stop (Disable) Closed to run Open : Analog Input
Closed : Fwd Enable Open to activate fast stop Closed : Speed Preset 1

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Notes :

Forward speed is defined by clockwise rotation as viewed looking towards the

motor shaft.

If P-19 = 0 and digital input 3 = 0, the analog input will be in volts (0-10V)
irrespective of the setting in P-16. If digital input 3 = 1, the current input format
will be 4-20mA unless P-16 is set to either 0-20mA or 20..4mA. This allows the
input format to be switched between voltage (local) and current (remote)
formats. The dual analog input option card provides a facility for connecting the
second analog input.

If P-19 <> 0, the analog input format will be defined by the setting in P-16 :
(0-10V / 4-20mA / 0-20mA / 20-4mA / 10..0V / -10V..10V).

If P-19 = 5, 7 or 9 the fail-safe “wire-break” mode is supported, where either

digital input 1 or 2 will be active for forward and reverse operation respectively.
In this case, a break in the wire will always result in the drive being disabled
and the motor coming to zero.

Default setting : 0

P-20 … P-23 Preset / Jog speeds 1 … 4

Parameters P-20 – P-23 permit the user to define up to 4 individual preset

speeds. The preset speeds are selected using the programmable digital inputs.
The preset speeds can be set to any value within the range P-02 (miniumum
value) to P-01 (maximum value).

Maximum value : P-01

Minimum value : P-02
Default value : 50.0Hz for P-20, 0.0Hz for P-21 … P-23

P-24 Slip compensation correction factor

When the rated speed of the motor connected to the Optidrive is entered into
P-10, slip compensation is automatically activated. This means that the
Optidrive will attempt to maintain constant shaft speed independent of the
applied mechanical load. This calculation assumes particular motor
characteristics which may vary from motor to motor. This parameter allows the
user to trim the level of slip compensation applied. When set to the factory
default value (100%), there is no change to the slip compensation applied.

Maximum value : 250%

Minimum value : 20%
Default value : 100%

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P-25 Analog output function

The function of the analog output can be controlled using this parameter. The
following options are available :

Analog output mode

P-25 = 0 : Motor Speed. 0V = zero speed, +10V = max speed (P-01)
P-25 = 1 : Motor Current. +10V = 200% of the motor rated current (P-08)

Digital output mode

P-25 = 2 : +5V when drive enabled, 0V when disabled
P-25 = 3 : +5V when motor at set speed, 0V otherwise

Digital output modem can be used in conjunction with the optional 2nd relay
output module. This 2nd relay is driven by the digital output and effectively adds
an independent relay output to that within the Optidrive (controlled from P-18).

Default value : 0 (analog speed otuput)

P-26, P-29 V/F characteristic adjustment

The Voltage - Frequency characteristic defines the level of voltage that is

applied to the motor at any given frequency. Depending on the setting of P-06,
this will have either a linear characteristic (where voltage increases linearly
with frequency – P-06 = 0) or a quadratic characteristic (where voltage
increases in proportion to (frequency)2 – P-06 = 1).

Firstly, the above characteristic will be modified by the setting of P-11 (voltage
boost level). Parameters P-26 and P-29 then give an extra level of adaptation,
allowing the user to further modify the V/F characteristic should this be
required.

Parameter P-29 can be set to any frequency between 0 and the base
frequency (P-09) and represents the frequency at which the percentage
adjustment level set in P-26 is applied.
This is best visualised by considering a rubber band stretched along a line
representing the Voltage/Frequency characteristic. The effect on the V/F
characteristic of changing P-26 / P-29 is the same as getting hold of the rubber
band at the frequency specified in P-29 and moving it up or down to represent
the voltage adjustment level specified in P-26. In this way, there is a smooth
change in voltage as frequency increases, thereby avoiding voltage
discontinuities.
Note that the voltage at any particular frequency can be increased or
decreased to suit the needs of the application.

When P-29 = 0, this function is disabled.

P-26 : P-29 :
Maximum value : 250% Maximum value : P-09
Minimum value : 20% Minimum value : 0 Hz
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Default value : 100% Default value : 0 Hz

P-27, P-28 Skip frequency / Skip frequency band

The skip frequency parameters are used to set up a band of frequencies

through which the drive output frequency may pass, but never stop in. This is
used typically to prevent continuous operation close to any frequency at which
mechanical resonances may occur. Such resonances may simply cause
excessive acoustic noise or may in some cases cause mechanical stresses
that could lead to mechanical failure.

Parameter P-27 specifies the centre point of the skip frequency band and P-28
the width of that band. Consider the following example :

P-27 = 30Hz, P-28 = 10Hz

This will give a skip frequency band between 25Hz and 35Hz, centred on
30Hz. If the analog speed reference then requests a speed within these limits,
the speed will remain at the nearest limit. When the output frequency ramps
between these two limits, it will do so at the ramp rates specified in P-03 and
P-04.

In the event of the output / motor running at negative speeds, the skip
frequency band will have exactly the same effect as in the positive direction.

P-27 : P-28 :
Maximum value : P-01 Maximum value : P-01
Minimum value : 0 Minimum value : 0
Default value : 0 Default value : 0

P-30 Start mode / Auto reset select

This parameter allows the user to define the start-up mode of the Optidrive and
operates in conjunction with the hardware enable signal applied between
terminals 1 and 2.

Possible settings are : Edge-r (Edge run – requires the run signal to
be applied after a trip or power-down
to start)
Auto-0 (Auto-run – enables whenever a run
signal is present (assuming no trip)
Auto-1 (As Auto-0, except for the fact that the
à Optidrive will attempt to auto restart
Auto-4 after a trip. The number of re-start
Attempts is given by the number after
the “Auto-“. The re-start counter is
reset after a power down.

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In the factory default setting (Auto-run), the Optidrive will start and run
whenever terminals 1 and 2 are linked, provided there is no trip condition.

“Edge-r” may be used where the drive should not start automatically on power
up should the run switch be closed. In this case, the run switch must be
opened and then re-closed before the drive will start. The same rule applies
after clearing / re-setting a trip condition.

If the application requires that the drive attempts to re-start after a trip
condition, parameter P-30 can be set to Auto-1 … Auto-4, in which case the
drive will attempt to clear the trip and re-start between 1 and 4 times after a
trip. After this number of re-starts have been attempted, the drive will remain in
a tripped state. Typically, an operator would investigate the cause of the trips
at this stage.
In each of these cases, a delay of 20s will elapse after a trip before the
Optidrive attempts a re-start.

Default setting : Auto-0 (enables whenever a run signal is present)

P-31, P-32, P-33 DC injection braking control

DC injection braking is typically applied just before the output of the Optidrive
is disabled (when a stop command has been issued) to ensure that the motor
has come to standstill. This is often used in conjunction with a mechanical
brake which can be activated using the on-board relay (configured using P-18).
The relay contacts will only open when the Optidrive disables its output (P-18 =
0) ie after DC injection braking has been applied.

To cater for different motors / inertias, the level of DC injection braking

(voltage) can be set using P-31 and the duration in seconds in P-32.

Note that DC injection braking is only applied after a stop signal has been
issued (drive enable removed) and the output has ramped to zero. If coast to
stop has been selected (P-05 = 1), DC injection braking will not be applied.

In some applications (typically fans and pumps) a motor / load may freewheel
when not being driven by the Optidrive (due to air / fluid flow). In these cases, it
is beneficial to brake the motor to standstill before attempting to accelerate it
up to the operational speed. This prevents possible over-current trips that may
otherwise occur. In such cases, the motor can be also braked to zero using
DC injection braking. In this case, it must be applied after an enable signal has
been applied prior to the output ramping up from zero.

P-34 External braking resistor selection

If an external braking resistor is to be used with the Optidrive to enable high

inertia loads to be stopped rapidly, P-34 must be set accordingly. The following
options are available :

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P-34 = 0 Internal braking control disabled. Braking resistor has no effect.

P-34 = 1 Internal braking control activated. In addition, the internal power

dissipation monitor is activated which ensures that the thermal
limit of the externally connected braking resistor is not exceeded.
This monitor assumes that one or more of the Invertek Drives
“Optibrake” braking resistors is connected, where the thermal
limits are known.
If the power dissipation limit is exceeded, the Optidrive will trip
displaying the message “OL-br” (Overload brake resistor).
In the event of other (non-Invertek) resistors being used, P-34
should be set to 2.

P-34 = 2 Internal braking control activated. The internal power dissipation

monitor is disabled. This means that it is now possible to
overload the external braking resistor and other protection
methods should be considered. This setting should be used if, for
example, high power braking resistors are connected.

Default setting : 0 (braking resistor control disabled)

P-35 Speed reference input scaling factor

This parameter is used to scale either the analog speed reference or the digital
speed reference, depending on whether the Optidrive is in terminal or keypad
mode.

When the Optidrive is in terminal mode (P-12 = 0 or 3), this parameter is used
to scale the analog input so that a 0...10V signal on the input controls the
output speed linearly between the minimum (P-02) and maximum (P-01) speed
limits. The adjustment of P-35 to match the operating range P-02 to P-01 is
done automatically by the Optidrive whenever P-01 or P-02 is changed.

When the Optidrive is in keypad mode (P-12 = 1 or 2), P-35 will typically have
a value of 100%, irrespective of the settings of P-01 and P-02. If the Optidrive
is being controlled from its own keypad, or via keys connected to the input
terminal strip (remote push-button control), there will normally be no need to
change P-35.

In Master / Slave mode, all slave drives must be in keypad mode (ie P-12 = 1
or 2). If the relative speeds of the Master and various slave drives need to be
set independently to suit the application (speed scaling), this can be done by
setting P-35 to the required value in each of the slave drives. Any slave drive
can be set to run at between 20% and 500% of the Master drive.

Note that the acceleration ramp times should be scaled by the same factor as
the Master / Slave speed. For example, if a slave drive runs to 2x the speed of
the Master drive, its accel / decel ramp times should be set to 0.5x those of the

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Master. This ensures accurate ramp rate following in addition to end speed
following.

Master / Slave mode utilises OptiLink – an easy-to-use polymer fibre

interconnect system that allows multiple Optidrives to communicate optically.
This is described in more detail in the Application Note section.

Maximum value : 500%

Minimum value : 1%
Default setting : 100%

P-36 Serial communications drive address

All communications between the Optidrive an other peripheral products (eg

Optiwand, OptiGate etc) is carried out via the optical IrDA interface. To allow
multiple drive communications networks (where multiple Optidrives are
connected to the same optical link), it is necessary for each drive to have its
own unique identifier ie drive address.

The drive address can be set to any value between 1 and 63, allowing upto 63
discrete drives to be connected on the same optical network. When any
Optidrive receives a valid telegram (message) via the optical interface, it will
only respond to the command if that telegram contains its own drive address.
In this way, any one drive from the entire group of 63 can be picked out which
will then respond in the requested manner.

If P-36 = 0, all communications are disabled.

Maximum value : 63
Minimum value : 0
Default setting : 1

P-37 Advanced menu access code definition

Parameter P-37 can be used to allow the user to specify their own extended
menu access code. Access to the extended menu (P-15 to P-40) is only
permitted when the value entered into P-14 equals that stored in P-37. In this
way, the user may change to code from the standard value of “101” to any
desired value. This feature is often used in conjunction with P-38 (parameter
write access)

Maximum value : 9999

Minimum value : 0
Default setting : 101

P-38 Parameter access control

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This parameter allows the user to specify what type of access to parameters is
to be permitted and can as such be used to lock all parameter write (change)
operations. The following settings are available :

P-38 = 0 All parameters can be accessed and changed. All changes will
be saved in permanent memory and will apply even after a power
down. The parameter save-to-memory process is automatic.

P-38 = 1 All parameters can be accessed and changed. All changes will
saved in temporary memory and will be functional until the
Optidrive is powered down. After the next power up, the
parameter settings will be extracted from permanent memory
such that all changes made with P-38 = 1 will be lost. This setting
may be used to test experimental settings without risk of losing a
known set of parameter settings.

P-38 = 2 All parameters can be accessed for read purposes but changes
are not permitted. This ensures that a set of working parameters
are not changed by unauthorised users. If P-38 has been set to
2, the user can then specify an extended access code in P-37.
Only with this code can access to the extended menu be
obtained and P-38 changed to 1 or 2.

Maximum value : 2
Minimum value : 0

Default setting : 0 (all changes permitted and changes automatically saved)

P-39 Hours run indicator

This is a read only parameter indicating the number of hours that the Optidrive
has been running. It is not re-settable and therefore holds useful information on
the lifetime of the Optidrive and / or the equipment that it is driving.

P-40 Drive type identifier / software version

This read only parameter allows the user to determine the Optidrive voltage
and power rating in addition to the software version.

A typical display indicating the voltage/power rating would be H3 7.5,

indicating a 400V, 3phase 7.5kW rating. Similarly, a diaply of L1 0.75 would
indicate a rating of 230V, 1phase 0.75kW.

The software version (eg 1.05) will be displayed if the user presses the <UP>
key on the Optidrive keypad.

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5. Fault codes, drive status and diagnostics

To enable the operational status of the drive to be determined at any time, the
following information is displayed :

Drive OK, disabled : StoP

Drive running : Output frequency / speed of drive, or motor current
Fault / trip : fault mnemonic as defined below.

The following list indicates which mnemonics will be displayed under certain
conditions, and their meaning.

Mnemonic Description
StoP Drive power stage disabled. This message will be displayed when drive is
stopped and no are faults present. The drive is ready for normal operation.
P-deF Default parameters loaded. This message will be displayed when the user
invokes the command to load the factory default parameters.
O-I Over-current on drive output. If this occurs during normal operation, it may
indicate an excessive acceleration rate or that the kW rating of the motor is
greater than that of the drive.
O-Uolt Over-voltage on DC bus. This may occur if the deceleration rate is too rapid.
Normally, this can be resolved by fitting an external braking resistor(s) to the
Optidrive power terminals. Ensure that P-34 is set to 1 or 2 to enable the
Optidrive internal braking circuit.
U-Uolt Under voltage on DC bus. This indicates that the mains supply voltage is
below the minimum limit. This message occurs naturally every time the
supply to the drive is switched off.
OL-br Brak resistor thermal overload. When P-34 = 1, the Optidrive monitors the
power dissipation in the braking resistor(s) connected to the Optidrive. If the
permitted internal limit is exceeded, the Optidrive will trip with this fault
message. The deceleration ramp time must either be reduced or more
braking resistors must be added. When multiple brake resistors are used, the
minimum braking resistor ohmic value must be observed.
OI-b Brake resistor short circuit. This usually indicates a low resistance or short
circuit across the braking resistor.
I.t-trP Motor thermal overload. When the motor current level exceeds 100% of the
motor current value entered into P-08, the Optidrive will monitor the level and
duration of the overload. Depending on the overload level, the Optidrive will
trip with this message after a certain time period. Typically, the Optidrive will
deliver 150% of the current in P-08 for 1 minute.
th-Flt Faulty thermistor on heatsink. This is not a user serviceable part. The user
must refer to their authorised Optidrive distributor to rectify this fault.
EE-F EEPROM checksum failure. Parameters not saved, defaults reloaded. This is
not a user serviceable part. The user must refer to their authorised Optidrive
distributor to rectify this fault.
PS-Flt Internal power stage fault, indicating an over-current or a thermal overload
within the power switching module. If this fault occurs as soon as the
Optidrive is enabled, it may indicate a failed power module. In this case, The
user must refer to their authorised Optidrive distributor to rectify this fault.

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O-t Heatsink over temperature. This generally indicates that the Optidrive is
operating at too high a switching frequency for the operating load and / or
environmental temperature. Reduce the switching frequency or improve
airflow / cooling to overcome this problem.
E-trP External trip. This trip message occurs when one of the digital inputs has
been configured (using P-19) to support an external trip. Depending on the
setting of P-19, this may be Digital input 2 or 3. Both of these inputs are
suitable for thermistor connection (type PT100). When this input is shorted to
0V (or < 2k), no trip will occur. When the resistance increases beyond 5k , the
Optidrive will trip on E-trP.
SC-trP Serial communications trip. Communication between the Master and Slave
Optidrives in Master / Slave mode has been interrupted. Ensure that the
OptiLink is intact.
Iin-F The current level on the analog input has fallen below 2mA when the input is
configured for 4..20mA operation. The current should remain within the
expected range.

Overcurrent :

If the drive is required to accelerate / decelerate at a rate that would require >150%,
the increased current level will be limited to 175% drive current by hardware. This
may result in the motor accel / decel rate not being achieved.

If excessive acceleration / deceleration is selected (very low ramp rates), it is possible

that the drive may trip on overcurrent (O-I).

When the drive is delivering >100% motor current, an I.t integral will result in the drive
tripping, should the permitted time limit be exceeded. This will occur after 1 minute at
150%.

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6. User options

The easy-to-use, yet powerful features of the Optidrive are enhanced by a range of
options. A further powerful feature of these options is that they can be retrofitted to
the Optidrive without the user having to re-design the mechanical layout of his
application.

1. Power dump resistor (applies to size #2 upwards)

All Optidrives (excluding size #1) are fitted with a power dump module as
standard. In conjunction with an external braking resistor(s), the Optidrive can
be configured to decelerate rapidly, where the inertial energy of the load is
dumped as heat in the braking resistor. In so doing, the otherwise inevitable
over-voltage trip is eliminated.

To maintain the ease-of-use concept, the brake resistor(s) are custom

designed to be mounted on the side of the heatsink of the Optidrive. This
provides ideal cooling for the resistors and requires no additional mounting
space within the cabinet.

To protect against thermal overload, the Optidrive can be set to monitor the
power dissipation within the brake resistor (applies to the standard Invertek
“Optibrake” resistors only). If the thermal limit of the resistor is exceeded, the
Optidrive will trip before damage to the resistor results. This feature is
activated when P-34 = 1.

This monitor can be disabled (P-34 = 2), allowing braking resistors with greater
power to used.

Each of the resistors is fitted with an internal fusible link. This eliminates the
risk of massive overheating of the resistor should any other component fail.

One standard braking resistor (250W) has been designed for use with sizes #2
and #3 Optidrives. Each Optidrive can accommodate two braking resistors -
one on either side of the Optidrive heatsink.

A larger (500W) resistor is available for Optidrives sizes #4 and #5. These
have the same design features as the above resistor.

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MECHANICAL AND ELECTRICAL INSTALLATION

WARNING
CAUTION • Optibrakes should be installed only by qualified
• Carefully inspect the Optibrake before installation to electrical persons and in accordance with local and
ensure it is undamaged. national regulations and codes of practice.
• Store the Optibrake in its box until wanted. Storage • Electric shock hazard! Disconnect and ISOLATE
o the Optidrive before attempting any work on it. High
should be clean and dry. Temperature range –40 C to
o voltages are present at the terminals and within the
+60 C.
OPTIBRAKE • Install the Optibrake on to the Optidrive heat-sink
ensuring it mounts securely and achieves a good thermal
drive for up to 10 minutes after disconnection of the
electrical supply.
contact. The Optidrive should then be mounted onto a • Where the electrical supply to the drive is through a
plug and socket connector, do not disconnect until 10
User Guide
All rights reserved. No part of this User Guide may be
flat, vertical, flame-resistant vibration-free mounting within
an IP54 or equivalent enclosure (EN60529).
• Flammable materials should not be placed close to the
minutes have elapsed after turning off the supply.
• Note in operation the surface of the Optibrake can
o
reproduced or transmitted in any form or by any means, Optibrake. reach temperatures in excess of 100 C.
electrical or mechanical including photocopying, recording or
by any information storage or retrieval system without
permission in writing from the publisher. SPECIFICATIONS
Optibrake for Optidrive Size 2 and 3 200 Watt continious 6kW peak for 0.132 S
Copyright Invertek Drives Ltd © 1999
Optibrake for Optidrive Size 4 5oo Watt continious 25kW peak for 0.132 S
The manufacturer accepts no liability for any consequences
resulting from inappropriate, negligent or incorrect installation.
The contents of this User Guide are believed to be correct at
the time of printing. In the interests of a commitment to a policy
of continuous improvement, the manufacturer reserves the
right to change the specification of the product or its
performance or the contents of the User Guide without notice.

SAFETY
This brake resistor is specifically designed to be used
with the Optidrive variable speed drive product and is
intended for professional incorporation into complete
equipment or systems. If installed incorrectly it may
present a safety hazard. The Optidrive uses high
voltages and currents, carries a high level of stored
electrical energy, and is used to control mechanical
plant that may cause injury. Close attention is Fixings
required to system design and electrical installation to provided
avoid hazards in either normal operation or in the
event of equipment malfunction.
System design, installation, commissioning and
maintenance must be carried out only by personnel
who have the necessary training and experience.
They must read carefully this safety information and
the instructions in this Guide and follow all information
regarding transport, storage, installation and use of
the Optibrake, including the specified environmental
limitations.
Please read the IMPORTANT SAFETY
INFORMATION below, and all Warning and Caution
boxes elsewhere.
Wires
connect to
SAFETY NOTICES + and BR
WARNING is given where there is a hazard that could terminals
lead to injury or death of personnel.
CAUTION is given where there is a hazard that could
lead to damage to equipment. EASY START UP
• Optibrake is designed to slide on to the side of the Optidrive heatsink creating a simple integrated
It is the responsibility of the installer to ensure that the
equipment or system into which the product is assembly.
incorporated complies with the EMC legislation of the • Fixing screws for the Optibrake are provided along with spring washers. Ensure these are
country of use. Within the European Union, equipment fastened securely before operation.
into which this product is incorporated must comply • The wires of the Optibrake connect to the + and BR terminals on the Optidrive, orientation is not
with 89/336/EEC, Electromagnetic Compatibility. important.
• To enable the Optibrake to work Parameter 34 of the drive needs setting to 1 (NOT to 2 as this
WARNING would disable software overload protection of the resistor). Note to access P34 the value of P14 may
Within the European Union, all machinery in which need to be set to 101, refer to the Optidrive manual for further information.
this product is used must comply with the Directive • For heavy braking applications a maximium of two resistors can be fitted in parallel, one to either
89/392/EEC, Safety of Machinery. In particular, the side of the Optidrive.
equipment should comply with EN60204-1.

CONFORMITY with STANDARDS

WARRANTY
For an Optidrive fitted with an Optibrake the following standards apply:
All Invertek Drives Ltd (IDL) products carry a 2-year
• CE-marked for Low Voltage Directive.
warranty, valid from the date of manufacture.
• IEC 664-1 Insulation Coordination within Low Voltage Systems.
• UL 840 Insulation coordination for electrical equipment.
Complete Warranty Terms and Conditions are
available upon request from your IDL Authorised • EN50081-2 EMC Generic Emissions Standard, Industrial Level.
Distributor. • EN50082-2 EMC Generic Immunity Standard, Industrial Level.
• Enclosure ingress protection, EN60529 IP20, NEMA 250.
• Flammability rating according to UL 94.
Invertek Drives Ltd
Four Crosses
Llanymynech
Powys
SY22 6LP G O Jones, Technical Director
UK
For use with following Optidrives OD-BRES02-IN 22110 24075 34055
Tel: +44 (0) 1691 831133 22150 24110 34075
Fax: +44 (0) 1691 831176 22220 24150 34110
email: enquiry@invertek.co.uk 24220 34150
Internet: www.invertek.co.uk 24300
24400
OD-BRES04_IN 44185
44220
Part No. 82-OBMAN-UK 44300
Rev 01, ECN0008 May 1999 44375

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2. External filter unit

In order to comply with the European standards on emissions (EN50081-1 and

EN50081-2), a range of optional mains filters are available for use with the
Optidrive.
To maintain the ease-of-use concept, the filters are custom designed to be
mounted on the base of the heatsink of the Optidrive. This requires no
additional “floor space” within the cabinet.

The mains filters are supplied with integral power cables that should be
connected to the input of the associated Optidrive. In addition to the inherent
earth connection through the mechanical mounting of the Optidrive on top of
the filter, an additional earth connection ensures that the necessary earth
connection is present.

The filters are available in both single and 3-phase versions for the size #1 and
size #2 Optidrives and a 3-phase version for the size #3 Optidrives. Size #4
and size #5 Optidrives have an integral filter.

To obtain the desired level of conducted and radiated emissions, it is essential

that the mains filter and motor cable are connected in accordance with the
User Guide (see next page). The motor cable should have an earthed screen,
which must be connected at both the drive and motor side.

Depending on the length of the motor cable, the mains filter allows compliance
with the more stringent light industrial (domestic / class B) emissions levels.
Exact details are shown in the User Guide (see next page).

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MECHANICAL AND ELECTRICAL INSTALLATION

CAUTION WARNING
• Carefully inspect the Optifilter before installation to • Optifilters should be installed only by qualified
ensure it is undamaged. electrical persons and in accordance with local and
• Store the Optifilter in its box until wanted. Storage should national regulations and codes of practice.
o
be clean and dry. Temperature range –40 C to +60 C.
o
• Electric shock hazard! Disconnect and ISOLATE
• Install the Optifilter on a flat, vertical, flame-resistant the Optidrive before attempting any work on it. High
OPTIFILTER vibration-free mounting within an IP54 or equivalent
enclosure (EN60529).
voltages are present at the terminals and within the
drive for up to 10 minutes after disconnection of the
• Flammable material should not be placed close to the
User Guide
All rights reserved. No part of this User Guide may be
filter.
• Wherever control cabling is close to power cabling,
electrical supply.
• Where the electrical supply to the drive is through a
plug and socket connector, do not disconnect until 10
reproduced or transmitted in any form or by any means, maintain a minimum separation of 100 mm and arrange minutes have elapsed after turning off the supply.
electrical or mechanical including photocopying, recording or by crossings at 90o • These filters contain capacitors that are
any information storage or retrieval system without permission connected between phase and earth; a leakage
in writing from the publisher.
current will flow during normal operation, therefore a
Electrical Filter wire good earth connection is essential and must be
Copyright Invertek Drives Ltd © 1999
supply connects to connected before applying power to the filter.
The manufacturer accepts no liability for any consequences connects drive input and
resulting from inappropriate, negligent or incorrect installation. to filter drive earth
The contents of this User Guide are believed to be correct at
the time of printing. In the interests of a commitment to a policy CONFORMITY with
of continuous improvement, the manufacturer reserves the right STANDARDS
to change the specification of the product or its performance or
the contents of the User Guide without notice. • CE-marked for Low
SAFETY Voltage Directive.
• IEC 664-1 Insulation
This filter is specifically designed to be used with the
Optidrive variable speed drive product and is intended Coordination within Low
for professional incorporation into complete equipment
h2 Voltage Systems.
or systems. If installed incorrectly it may present a • UL 840 Insulation
safety hazard. The Optidrive uses high voltages and coordination for electrical
currents, carries a high level of stored electrical equipment.
energy, and is used to control mechanical plant that • EN50081-2 EMC Generic
may cause injury. Close attention is required to Emissions Standard,
system design and electrical installation to avoid Industrial Level.
hazards in either normal operation or in the event of • EN50082-2 EMC Generic
equipment malfunction.
h1 Immunity Standard, Industrial
System design, installation, commissioning and Level.
maintenance must be carried out only by personnel • Enclosure ingress
who have the necessary training and experience. protection, EN60529 IP20,
They must read carefully this safety information and NEMA 250.
the instructions in this Guide and follow all information • Flammability rating
regarding transport, storage, installation and use of according to UL 94.
the Optifilter, including the specified environmental
limitations.
Please read the IMPORTANT SAFETY d2
INFORMATION below, and all Warning and Caution w
boxes elsewhere.
d1 G O Jones, Technical Director

EASY START UP
SAFETY NOTICES
• Optifilter is designed to slide on to the back of the Optidrive heatsink creating a simple integrated assembly.
WARNING is given where there is a hazard that could • Fixing holes for the combined assembly are the same as for the standalone drive; longer screws are provided.
lead to injury or death of personnel. • The electrical supply connects to the filter; connection of the supply earth to the filter earth is essential.
CAUTION is given where there is a hazard that could • The filter wire (see diagram above) connects to the drive input and drive earth points as per the label on the wire.
lead to damage to equipment. • E When screened motor cable is used and connected as per the Optidrive manual employing good wiring
practice, the integrated Optifilter and Optidrive assembly meets the European standard for EMC for motor - drive
It is the responsibility of the installer to ensure that the cable lengths defined in the table below.
equipment or system into which the product is
incorporated complies with the EMC legislation of the
country of use. Within the European Union, equipment Size 1 1 2 2 3
into which this product is incorporated must comply Optifilter model reference OD-xxxx-IN F1121 F1341 F2121 F2341 F3341
with 89/336/EEC, Electromagnetic Compatibility. Supply voltage +/- 10% 220-240 220-480 220-240 220-480 220-480
Phases 1 3 1 3 3
Output current (max) A 10 6 16 30 30
WARNING Earth leakage mA <1.6 <30 <1.6 <30 <30
Within the European Union, all machinery in which Dimensions W 90 90 105 105 105
this product is used must comply with the Directive H1 200 200 300 300 300
89/392/EEC, Safety of Machinery. In particular, the mm H2 30 30 20 20 20
equipment should comply with EN60204-1. mm D1 175 175 225 225 225
mm D2 45 45 50 50 50
WARRANTY mm
Weight (filter only) kg 0.5 0.5 0.9 0.9 0.9
Weight (filter + drive) kg 1.6 1.6 3.7 3.7 6.5
All Invertek Drives Ltd (IDL) products carry a 2-year
warranty, valid from the date of manufacture. This
Compliance to Conducted Emissions standards E
date is clearly visible on the rating label.
EN 50081-1 (Domestic): motor-drive cable length
Complete Warranty Terms and Conditions are Drive Fsw (P-17) =8kHz m 10 3 5 5 5
available upon request from your IDL Authorised Drive Fsw (P-17) =16kHz m 5 3 5 5 5
Distributor. Drive Fsw (P-17) =32kHz m 5 3 5 5 5
EN50081-2 (industrial): motor-drive cable length
Drive Fsw (P-17) =8kHz m 40 10 35 35 30
Invertek Drives Ltd Drive Fsw (P-17) =16kHz m 30 10 30 30 30
Four Crosses Drive Fsw (P-17) =32kHz m 25 8 25 25 25
Llanymynech
Powys Compliance to Radiated Emissions standards E All Optidrives comply to EN 50081-1 with or without filter
SY22 6LP
UK For use with following Optidrives OD-xxxxx-IN 12037 14075 22110 24075 34055
12055 14150 22150 24110 34075
Tel: +44 (0) 1691 831133
12075 22220 24150 34110
Fax: +44 (0) 1691 831176
12150 24220 34150
email: enquiry@invertek.co.uk
24300
Internet: www.invertek.co.uk
24400

Part No. 82-OFMAN-UK

Rev 01, ECN0008 March 1999

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3. PI controller module

To further extend the application areas of the Optidrive, a PI controller module

is available. This is designed to plug directly into the Optidrive User control
terminal strip and requires no additional external power sources.

The PI controller input will support feedback transducers with either a 0…10V
(3-wire) format or a 4…20mA (2-wire) format.

The feedback transducer can also draw its supply from the PI controller card,
provided that it will function correctly on a 10V supply.

Application areas include :

• Temperature control
• Pressure control
• Flow rate control
• Closed loop speed control

The PI controller is designed primarily for systems that have a response time in
the range 0.1s to 10s – a typical range for many applications.

Both the Proportional and Integral gains can be set. The P-Gain is set using a
5-turn potentiometer. The integral gain can be changed to 0.1s, 1s or 10s by
setting up the on-board switches. These settings are detailed in the User
Guide (see next page)

In a similar fashion, the format of both the reference input and feedback inputs
can be set using the on-board switches.

If the system is to be set to run at a preset level, an on-board reference

potentiometer can be used to adjust the quantity being controlled to the
required level. In this way, the system can be set up without the need for an
external reference signal.

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MECHANICAL AND ELECTRICAL INSTALLATION

WARNING
CAUTION • Optidrives and the Option Modules should be
• Store the Optidrive Option Module in its box until installed only by qualified electrical persons and in
required. It should be stored in a clean and dry accordance with local and national regulations and
environment. Temperature range –40oC to +60 oC. codes of practice.
• Install the Option Module onto the Optidrive by inserting • Electric shock hazard! Disconnect and ISOLATE
PI OPTION the row of 11 pins into the terminal connector of the
Optidrive, ensuring that the terminals are tightened.
the Optidrive before attempting any work on it. High
voltages are present at the terminals and within the
drive for up to 10 minutes after disconnection of the
MODULE • If the Option Module is being used with Size#1 Optidrive,
care should be taken to support the Option Module when
electrical supply.
the terminal screws of the Option Module are being • Where the electrical supply to the drive is through a
User Guide tightened or loosened. plug and socket connector, do not disconnect until 10
minutes have elapsed after turning off the supply.
All rights reserved. No part of this User Guide may be
reproduced or transmitted in any form or by any means,
electrical or mechanical including photocopying, recording or SPECIFICATIONS
by any information storage or retrieval system without
permission in writing from the publisher. Rated reference input : +/- 10V DC or 4…20mA Proportional gain range : 0.2 …. 30
Copyright Invertek Drives Ltd © 1999 Rated feedback input : +/- 10V DC or 4…20mA Integral gain settings : 0.1s, 1s, 10s
The manufacturer accepts no liability for any consequences
Max input voltage : +/- 50V DC Conformity : IP20, UL94V-0
resulting from inappropriate, negligent or incorrect installation. Environmental : -10ºC … +50ºC
The contents of this User Guide are believed to be correct at
the time of printing. In the interests of a commitment to a policy
of continuous improvement, the manufacturer reserves the SWITCH SETTINGS FOR OPERATIONAL MODE SELECTION
right to change the specification of the product or its
performance or the contents of the User Guide without notice. Switch Open (OFF) Switch Closed (ON)
SAFETY S1 * Integral gain 0.1s Integral gain 1s
This option module is specifically designed to be used S2 * Integral gain 0.1s Integral gain 10s
ON POT1
with the Optidrive variable speed drive product and is S3 Feedback format Feedback format
intended for professional incorporation into complete TEST PT 0…10V 4…20mA
POT2 S4 Reference format Reference format
equipment or systems. If installed incorrectly it may 1234
present a safety hazard. The Optidrive uses high 0…10V 4…20mA
voltages and currents, carries a high level of stored
electrical energy, and is used to control mechanical 1 2 3 4 5 6 7 8 9 10 11 * The greater integral time will take precedence should S1 and S2
plant that may cause injury. Close attention is be closed at the same time.
required to system design and electrical installation to Note :
avoid hazards in either normal operation or in the P-16 must be set to voltage mode (0-10V) to support this option module.
event of equipment malfunction.
System design, installation, commissioning and
maintenance must be carried out only by personnel POTENTIOMETER SETTINGS
who have the necessary training and experience.
They must read carefully this safety information and POTENTIOMETER 1 : REFERENCE VOLTAGE PRESET
the instructions in this Guide and follow all information For those applications that require a fixed preset operating point, an on-board preset potentiometer is available to avoid
having to use an external potentiometer for this type of application. To use this feature, S4 must be open (Off).
regarding transport, storage, installation and use of
the Option module, including the specified The preset voltage ranges from 0V (fully anticlockwise) to 10V (fully clockwise). Note that the preset voltage can be
environmental limitations. measured on the PI Option Module test point (see diagram above).
Please read the IMPORTANT SAFETY
INFORMATION below, and all Warning and Caution Important Note : If an external reference is used (either voltage or current format), this potentiometer must be turned
boxes elsewhere. to zero (fully anti-clockwise). If this is not done, an offset will be introduced by POT1.

POTENTIOMETER 2 : PROPORTIONAL GAIN ADJUST

The proportional gain of the PI controller is adjusted using POT2 (see above diagram). Minimum gain is achieved by
SAFETY NOTICES turning the Potentiometer fully anti-clockwise. In general, it is best use this setting as the starting point during
WARNING is given where there is a hazard that could commissioning of this Option Module with the Optidrive in any application.
lead to injury or death of personnel.
CAUTION is given where there is a hazard that could General Notes :
lead to damage to equipment. • When the 4..20mA setting is used for either the feedback (pin 7) or reference (pin 6) input and the 0.10V
setting is used for the other input (eg 0..10V ref, 4..20mA feedback), the voltages measured on pins 6 and
It is the responsibility of the installer to ensure that the 7 will be different under stable operating conditions. This is due to an offset of 2.5V that is introduced
equipment or system into which the product is internally to support 4..20mA operation. Control settles with the 0..10V input nominally 2.5V lower than
incorporated complies with the EMC legislation of the the 4..20mA input.
country of use. Within the European Union,
equipment into which this product is incorporated • Both Potentiometers 1 and 2 are 5-turn types, ie they require 5 full turns to cover the full range. In the event of the
must comply with 89/336/EEC, Electromagnetic maximum or minimum point being reached, the adjustment disengages to avoid mechanical damage.
Compatibility.
Both POT1 and 2 are turned to their minimum values (fully anti-clockwise) when delivered from Invertek Drives Ltd.
WARNING
Within the European Union, all machinery in which OPTION MODULE CONTROL TERMINALS
this product is used must comply with the Directive
89/392/EEC, Safety of Machinery. In particular, the
equipment should comply with EN60204-1. 1 2 3 4 5 6 7 8 9 10 11
* The analog PI
* Digital Input 1
* Digital Input 2
* Digital Input 3

Analog Output

Relay contact
* An feedback Inp
* Analog ref Input

Relay common
+10V Out
0V

0V

inputs must be
WARRANTY connected to Option PCB
All Invertek Drives Ltd (IDL) products carry a 2-year terminals 6 and 7. inserted into
warranty, valid from the date of manufacture. Optidrive control
Complete Warranty Terms and Conditions are terminal strip.
available upon request from your IDL Authorised
Distributor. All 11 terminal
screws on the
Invertek Drives Ltd STANDARDS CONFORMITY Optidrive must be
Four Crosses An Optidrive fitted with this Option Module complies with the tightened to
Llanymynech following standards: ensure good
Powys electrical contact
• CE-marked for Low Voltage Directive. and correct
SY22 6LP
UK • IEC 664-1 Insulation Coordination within Low Voltage functionality.
Systems.
Tel: +44 (0) 1691 831133 • UL 840 Insulation coordination for electrical equipment.
Fax: +44 (0) 1691 831176 • EN50081-2 EMC Generic Emissions Standard, Industrial
email: enquiry@invertek.co.uk Level.
Internet: www.invertek.co.uk • EN50082-2 EMC Generic Immunity Standard, Industrial Level.
• Enclosure ingress protection, EN60529 IP20, NEMA 250.
• Flammability rating according to UL 94. Optidrive size 2
Part No. 82-PICON-UK
Rev 03, ECN0018, November 1999

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7. Application Notes

Ref No Application Note Description

AN01 Matching the Optidrive to the motor
AN02 Selecting between Constant torque mode and fan / pump mode
AN03 Selecting the required stop mode
AN04 Locking parameters to prevent unauthorised changes
AN05 Displaying motor speed in RPM
AN06 Switching between voltage (local) and current (remote) reference inputs
AN07 Setting up skip frequency ranges
AN08 Selecting the required start / restart mode
AN09 Programming the output relay
AN10 Using the second relay output option module
AN11 Adjusting the slip compensation to maintain constant rotor speed
AN12
AN13
AN14
AN15
AN16
AN17 Activating DC bus voltage compensation (active motor voltage control)
AN18 Adjusting the V/F characteristic
AN19 Using the Optidrive with 2 preset speeds and forward / reverse
AN20 Using the Optidrive with 4 preset speeds
AN21 Using the Optidrive with remote push-buttons for speed control
AN22 Using the Optidrive with 8 preset speeds
AN23 DC injection braking on the Optidrive
AN24 Master / Slave operation using the Optical Link
AN25 Optidrive communications protocol
AN26 Optidrive param set data format
AN27 Roller-Shutter door control
AN28 Upgrading the Optiwand using OptiStore
AN29 RS485 applications using the Optidrive
AN30 PI control using OptiPort #1 (Up to software revision 1.02)
AN31 Controlling Optidrive via the Modbus Gateway
AN32 PI control using OptiPort #2 (From software revision 1.03)

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Application Note AN 01

Matching the Optidrive to the motor

• General

For the majority of industrial applications, the Optidrive will spin a motor without any
parameter adjustments being made to the Optidrive. In general, the “nameplate data” taken
from the rating plate of the motor should be entered into the Optidrive to ensure that the
Optidrive is matched to the motor, thereby avoiding the risk of damage to the motor occurring.

• Rating plate parameters

P-08 Motor rated current

The motor rated current in Amps should be entered into this parameter. Most
industrial motors have a Star / Delta rating to allow operation at different voltages.
Care should be taken to ensure that the current rating taken from the ratings plate
corresponds to the motor voltage rating (this depends on the way in which the motor
is connected (Star or Delta).
Typically, this will be displayed as 220V / 400V 3.3A / 1.9A

When this parameter has been set, the Optidrive will monitor the current and be able
to determine whether or not the motor is in overload. Should the motor run in an
overload condition for long periods of time (minutes), the Optidrive will trip. This
provides one level of protection to prevent the motor from overheating.

The factory default value for this parameter is the rated current of the Optidrive.

P-09 Motor rated frequency

The motor rated frequency in Hertz should be entered into this parameter. In general,
this value will be 50Hz so that no change is required to the factory default setting.

This parameter is changed for use with high-speed motors or with 60Hz motors.

P-10 Motor rated speed in rpm

This parameter only needs to be set if the user requires the speed to be displayed in
RPM, or if the application requires that changes in load on the motor do not cause a
significant change in the motor output speed.

When the rated speed has been set, all speed-related parameters (eg maximum
speed, minimum speed etc) will be in RPM.
Also, the Optidrive display will show the running speed in RPM in addition to the
speed in Hertz and current in Amps during normal operation.

Setting P-10 also activates the load (slip) compensation. This is a type of speed
control where the Optidrive monitors the level of the load on the motor and
automatically adjusts the frequency supplied to the motor to try to maintain constant
rotor speed.

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Application Note AN 02

Selecting between Constant torque mode and fan / pump mode

Author: Karl Doody, Invertek Drives Ltd

• General

For most applications, the rate at which the voltage is applied to the motor as the output
frequency increases is linear. This is constant torque mode and should be used if the
application requires torque to be maintained as speed is varied. For fan and some pump
applications, where the torque required drops as speed reduces, a significant energy saving
can be achieved at lower speeds by selecting the variable torque setting within the Optidrive.

• Parameters

P-06 V/F characteristic select

P-06 = 0, Constant torque mode Voltage / Frequency characteristic, P-06 = 0 (P-06 = 1)

The relationship between the
Voltage
voltage and frequency applied to
the motor can be seen in the P-15

following graph. Setting P-06 = 0

selects the constant torque mode,
(thick line) where the motor P-06 =
voltage is ramped up linearly in
proportion to frequency.
When P-06 = 1, the fan / pump
characteristic is selected, (thick
dashed line), where the voltage
increases in proportion to the P-06 =
square of the frequency. P-11

P-06 = 1, HVAC mode P-09/2 P-09 Frequency

For 5.5kW drives upwards, the
continuous output power limit is increased to that of the next drive size upwards when
P-06 = 1. The maximum limit for the motor rated current (P-08) changes to match this. When
HVAC mode is active, the overload capability is reduced from 150% to 110% for 60s.

Examples:
In an air conditioning system, where the drive is being used to spin a fan, the load torque at
startup is low. In such cases, set P-06 = 1 to reduce power consumption at lower speeds.
Compressors, however, require constant torque over their speed range. For such
applications, set P-06 = 0 to avoid stalling the motor.

This difference in application can be reflected within the Optidrive’s parameters, enabling the
drive to run more efficiently by only using as many volts as is needed to drive the motor.

Karl Doody
Invertek Drives Ltd

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Application Note AN 03

Selecting the required stop mode

Author: Karl Doody, Invertek Drives Ltd

• General

This feature defines the way in which the motor comes to standstill when the drive enable
signal is removed, or in the event of mains supply voltage loss. Some applications require
that in the event of mains supply loss, the drive stops as quickly as possible. Others require
that the drive try to keep going as long as it can, resuming normal operation if the mains
supply returns. Other applications may require the drive to decelerate at a constant ramp
rate, coast to stop, or perform an emergency stop, when the drive enable signal is removed.
This application note describes how P-05 can be used to put the Optidrive into these different modes.

• Parameters: P-05 Stop mode select

P-05 = 0, (default value), controlled ramp to stop with mains loss ride through

Removing the drive enable signal will decelerate the motor to stop at a rate defined by
the deceleration ramp time (P-04). In the event of the mains supply being lost, the
Optidrive will automatically attempt to keep itself operating by braking (regenerating)
and utilising the rotational energy of the motor. (Mains loss ride through). If the mains
supply returns, the drive will ramp back to its operational speed.
The rate of deceleration is set also by P-04, unless P-07 (Rapid Deceleration ramp
time) has been set to a value greater than zero. In this case, the deceleration ramp
rate set in P-07 is used.
The drive will only be disabled when the Optidrive output frequency reaches zero.
(Note that DC injection braking can be used to hold zero speed if required – see
parameters P-31 and P-32, and AN23).
Depending on load inertie, best performance may be achieved when P-07 is
somewhat longer than the normal braking time and may also be improved when slip
compensation is activated (whenever the motor rated speed is P-10 – see AN11).

P-05 = 1, coast-to-stop

In this case, the Optidrive output will be disabled as soon as the enable signal is
removed, leaving the motor to coast down to zero in an uncontrolled fashion.

P-05 = 2, controlled ramp to stop with no mains loss ride through

The motor will be ramped down to zero similarly to the case above, where
P-05 = 0 whenever the drive enable signal is removed.
In the event of mains loss, however, the drive will ramp the output down to zero at the
rate defined in P-04 if P-07 = 0, otherwise at the rate defined in P-07. The drive will
continue ramping to stop even if the mains supply returns. This allows the motor to be
stopped rapidly (a form of Emergency Stop), independently of the main deceleration
ramp time, in the event of the mains supply being lost.

Karl Doody
Invertek Drives Ltd

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Application Note AN 04

Locking parameters to prevent unauthorised changes

Author: Karl Doody, Invertek Drives Ltd

• General

Optidrive incorporates a feature that, when activated, effectively “locks” the settings of the
drive. Parameters within the drive can then be viewed but not changed. This is useful in
cases where the commissioning engineer wishes to ensure that unauthorised changes are
prevented.

• Changing the access code

Optidrive’s “Access Code” is a number between 1 and 9999, that has to be entered into P-14
before access to parameters 15 - 40 is permitted. By default, Optidrive’s access code is 101.
To gain access to parameters 15 - 40, this value must be entered into P-14. The user can
change the access code to any desired value between 1 and 9999 by setting P-37 to this
desired value.

Example:
Assuming the factory default settings of the Optidrive.
• Change P-14’s value to 101; the extended menu, P-15 to P-40, is now available.
• Change P-37‘s value from 101 to 1234, the “Access Code” is now 1234.

• Write protecting the parameters

P-38 controls the Optidrive parameter access mode.

When delivered from the factory, Optidrive’s P-38 is set to 0. This means that parameters can
be changed, and they are automatically saved on power down. A list of options available in P-
38 are described below:

0 – Parameters can be changed, they are saved on power down.

1 – Parameters can be changed, they are not saved on power down.
2 – Parameters cannot be changed, they are saved on power down.

Note that when P-38 = 2, parameters P-00, P-13, P-14, and P-38 to P-40 remain fully
accessible.

Example 2:
• Change P-38’s value to 2, so that parameters are “write-protected”.
• Change P-14 to 0 so that the Extended Menu, P-15 to P-40, cannot be accessed.

The parameters of the drive are now locked, and cannot be unlocked without changing P-38
to a 1 or 0. If P-37 has also been changed to the user’s prefered access code value,
parameter access can only be unlocked if the extended menu access code is known, allowing
access to P-38.

Karl Doody
Invertek Drives Ltd

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Application Note AN 05

Displaying motor speed In RPM

Author: Karl Doody, Invertek Drives Ltd

• General

Optidrive, by default, displays the operational speed and all speed related parameters in
Hertz. By setting the value of P-10 to the motor rated speed in RPM, Optidrive will display the
motor speed and the speed related parameters in RPM and depending on that value, will
either active slip compensation or not.

• Parameters

P-10 Motor rated speed

When this parameter is set to zero, the speed of the motor will be given in Hz. When
P-10 > 0, the speed related parameters will be displayed in RPM. Setting P-10 > 0
also activates the slip compensation.

When the rated speed has been set, all speed-related parameters (P-01, P-02,
P-20, P-23, P-27 and P-28) will be in RPM. Also, the Optidrive display will show the
running speed in RPM in addition to the speed in Hertz and current in Amps during
normal operation.

Setting P-10 also activates the load (slip) compensation. This gives improved motor
shaft speed control where the shaft speed of the motor is maintained under varying
load conditions. More information about this feature can be found in AN11.

Examples: (for a 2-pole 50Hz motor)

• If you want the speed and all speed related parameters to be displayed in Hz. P-10
should be set to 0 (factory default value).

• If you want both the speed and speed related parameters in RPM, and slip compensation
to be activated, set P-10 to the motor rated speed (as found on the motor rating plate).

If you want the speed in RPM, and slip compensation not to be activated, set P-10 equal to
the motor synchronous speed.

The motor synchronous speed for a 2 pole 50Hz motor = 3000 rpm
2 pole 60Hz motor = 3600 rpm
4 pole 50Hz motor = 1500 rpm
4 pole 60Hz motor = 1800 rpm
6 pole 50Hz motor = 1000 rpm
6 pole 60Hz motor = 1200 rpm
8 pole 50Hz motor = 750 rpm
8 pole 60Hz motor = 900 rpm

Karl Doody
Invertek Drives Ltd

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Application Note AN 06

Switching between voltage and current reference inputs

Author: Karl Doody, Invertek Drives Ltd

• General

The speed of the Optidrive can be controlled by either voltage based or current based
signals. This allows the speed to be controlled from a potentiometer or from an intelligent
control system (usually current based).

• Parameters

P-16 Analog input format

This parameter allows the user to configure the format of the signal connected to the
analog input (drive terminal 6). The following formats are supported :

0-10 V : Voltage input, 0V ... 10V

4-20 mA : Current input, 4mA ... 20mA
0-20 mA: Current input, 0mA ... 20mA
20-4 mA: Current input, 20mA ... 4mA (inverse mode)
10-0 V: Voltage input, 10V ... 0V (inverse mode)
-10-10 V: Voltage input, -10V ... 10V (bipolar mode)

When configured for one of the voltage input formats, the analog input accepts bipolar
input voltages in the range -10V..10V. When set to 0..10V or 10..0V, all negative
voltages will give zero speed. When set to -10..10V, all negative voltages will result in
the drive running with negative speeds, where the speed is proportional to the
magnitude of the input voltage.

All current input formats are unipolar. When 4..20mA or 20..4mA is selected, the
Optidrive will automatically trip when the input current falls below 2mA.

This is especially important for the inverse (20..4mA) setting where the drive would
otherwise give maximum output speed if the current input was to be interrupted.

P-19 Digital input function select

The analog input format can be switched using digital input 3 when P-19 = 0. A
voltage input format will be selected when the input is open, otherwise a current input
format is selected (when closed).

If digital input 3 is open: The analog input format is configured for a voltage
format with a range of 0…10V assumed, unless P-16 set
to a different voltage format (eg –10…10V).
If digital input 3 is closed: The analog input is configured for a current format with a
range of 4…20mA assumed, unless P-16 is set to a
different current format (eg 0...20mA).

Karl Doody
Invertek Drives Ltd

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Application Note AN 07

Setting up skip frequency ranges

Author: Karl Doody, Invertek Drives Ltd

• General

The skip frequency parameters are used to set up a band of frequencies through which the
drive output frequency may pass, but never stop in. This is used typically to prevent
continuous operation close to any frequency at which mechanical resonances may occur.
Such resonances may simply cause excessive acoustic noise or may in some cases cause
mechanical stresses that could lead to mechanical failure.

• Parameters

P-27, P-28 Skip frequency / Skip frequency band

Parameter P-27 specifies the centre point of the skip frequency band and P-28 the
width of that band. Consider the following example:
P-27 = 20Hz, P-28 = 10Hz

P-28 (Freq Skip Band)

10 15 20 25 30
Freq (Hz)

P-27 (Freq Skip Mid-Point)

This will give a skip frequency band between 15Hz and 25Hz, centred on
20Hz. If the analog speed reference then requests a speed within these limits,
the speed will remain at the nearest limit. When the output frequency ramps
between these two limits, it will do so at the ramp rates specified in P-03 and P-
04.

In the event of the output / motor running at negative speeds, the skip frequency band
will have exactly the same effect as in the positive direction.

P-27: P-28:
Maximum value: P-01 Maximum value: P-01
Minimum value: 0 Minimum value: 0
Default value: 0 Default value: 0

The width of the skip freq band is defined by: Lower limit = P-27 - P-28/2
Upper limit = P-27 + P-28/2

All skip frequency bands defined for forward speeds are mirrored for negative speeds

Karl Doody
Invertek Drives Ltd

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Application Note AN 08

Selecting the required start / restart mode

Author: Karl Doody, Invertek Drives Ltd

• General
The Optidrive can be configured to handle actions taken when the Optidrive is powered up
with the hardware enable signal already active and also what actions the Optidrive should
take in the event of a trip.

• Parameter settings

P-30 Start mode / Auto reset select

Terminal Mode (P-12 = 0)

P-30 = Edge-r (Edge run) :

The enable pin input is configured to be edge-triggered and requires the run signal to be
applied after a trip or power-down before the drive will start. “Edge-r” may be used where for
safety reasons the drive should not start automatically on power up should the run switch
already be closed. In this case, the run switch must be opened and then re-closed before the
drive will start. The same rule applies after clearing / re-setting a trip condition.

P-30 = Auto-0 (Auto-run) (default):

When the drive is in terminal mode (P-12 = 0) and provided the Optidrive is not
tripped, the Optidrive will enable and run whenever a run signal is present
(terminals 1 and 2 linked) even if the link is present on power-up. This is the
factory default setting (Auto-0).

P-30 = Auto-1 .. Auto-4:

Similar to Auto-0, except for the fact that they allow the user to define how many times the
drive will automatically clear a trip and try to restart before permanently tripping and then
requiring operator intervention. The Optidrive will make between 1 (Auto-1) and 4 (Auto-4)
attempts to clear the trip and restart.

The restart counter is reset by any of the following :

- Powering the drive down and back up again
- Pressing the reset (Stop) button on the drive keypad
- Removing and reapplying the hardware enable signal.

Keypad Mode (P-12 = 1 or 2)

P-30 = Edge-r :
If the hardware enable signal is closed on or after power-up, the drive requires the
START button to be pressed before the drive will run.

P-30 = Auto-0 :
If the hardware enable signal is closed on or after power-up, the drive will
automatically run without pressing the START button. In this setting, the drive will
auto-run and allow the speed to be varied using the UP and DOWN keys.
Karl Doody
Invertek Drives Ltd

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Application Note AN 09

Programming the output relay

Author: Karl Doody, Invertek Drives Ltd

• General

Optidrive has an internal relay which can be programmed to open / close depending upon
certain conditions within the drive. Other products or processes can then be integrated with
the drive so that an action can be performed based upon the status of the drive. There are 5
settings that can be chosen. These are described below :

• Parameters

P-18 Relay output function select

The condition under which the output relay closes is programmed using this
parameter. The following options can be selected:

0 : Drive enabled (contacts closed whenever the drive is enabled)

1 : Drive healthy (contacts closed when the drive is not tripped)
2 : Drive at Set speed (contacts closed when target speed reached)
3 : Motor at zero speed (contacts closed when speed is greater than 5% of
rated frequency set in P-09)
4 : Motor at max speed (contacts closed when speed at max speed (P-01))
5 : Motor current overload (contacts closed when motor current > P-08)

Th factory default setting is P-18 = 1. The contacts close when the drive is healthy.
The N.O. relay contacts are on terminals 10 and 11 of the Optidrive, as shown below.

Optidrive Terminal Strip

1 2 3 4 5 6 7 8 9 10 11

Relay contacts

Examples:

• To start other equipment (or Optidrives) as soon as the first Optidrive is enabled, set P-18
= 0 and connect the relay contacts to the enable input of the other equipment.

• To release a mechanical motor brake when the speed of the drive is > 0, set P-18 = 3 and
connect the supply for the brake via the relay contacts. The contacts close when the
frequency output is > 5% of the rated speed (as set in P-09)

Karl Doody
Invertek Drives Ltd

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Application Note AN 10

Using the second relay output option module

Author: Karl Doody, Invertek Drives Ltd

• General

Optidrive has it’s own internal relay that can be programmed to open / close depending on
the operating conditions of the drive. For those applications where a second independent
relay output is needed, the Second Relay Output option module can be used. The operation
of this option module is described below.

• Parameters

The conditions under which the second relay contacts open / close are determined using
parameter P-25.

P-25 Analog output function select

1 2 3 4 5 6 7 8 9 10 11

The second relay output contacts are available on terminals 8 and 9 of the option module
terminal strip. This relay utilises the Optidrive’s analog output for operation such that the
analog output is not available when this module is fitted.

To determine when this second relay open / closes, P-25 needs to be set accordingly. The
functionality of the analog output is set using this parameter. The following options are
available:

0: Output proportional to motor speed (10V output when speed = P-01)

1: Ouptut proportional to motor current (5V output when motor current = P-08)
2: Output +10V when drive enabled, 0V when drive disabled
3: Output +10V when target speed reached

When using the second relay option module, P-25 should be set to either 2 or 3.
When P-25 = 2, the relay on the option module is closed when the drive is enabled.
When P-25 = 3, the relay on the option module is closed when the target speed is reached.

For information on using the internal relay of the Optidrive, which can have different program
functions not available with the 2nd relay output option module, see AN09.

Karl Doody
Invertek Drives Ltd
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Application Note AN 19

Using the Optidrive with 2 preset speeds and forward / reverse

• General

The OptiDrive provides the user with the possibility of operating with two preset speeds
selected via a switch connected to terminal 4 of the user terminal strip and with forward /
reverse direction selected using a second switch connected to terminal 3 of the user terminal
strip. This mode of operation will be described below :

• Wiring details : 2 preset speeds with forwards / reverse

Pin 1 : 0V
START (Enable) Pin 2 : Digital input 1
Pin 3 : Digital input 2
REVERSE Pin 4 : Digital input 3

Preset 1 (open) /
Preset 2 (closed)

11-way Optidrive
control terminal strip

• Notes :

1. The Optidrive must be set to terminal mode with P-12 = 0 and P-19 = 8.

2. Set the required preset speeds in P-20 and P-21. When digital input 3 is open, P-20 is
selected. When digital input 3 is closed, P-21 is selected.

3. When digital input 2 is open, the preset speed set in P-20 or P-21 is selected. When
digital input 2 is closed, the selected preset speed will be reversed in terms of the
rotational direction of the motor.

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Application Note AN 20

Using the Optidrive with 4 preset speeds

• General

The Optidrive can be configured to operate with any one of 4 preset speeds, selected using a
2-pole, 4-position selector switch. This application note describes how this can be
implemented very simply.

• Wiring details :
Pin 1 : 0V
Pin 2 : Digital input 1
Enable
Pin 3 : Digital input 2
Pin 4 : Digital input 3
2 3 2 3
1 4 1 4

11-way Optidrive
2-way, 4-pole selector control terminal strip
switch

• Notes :

4. The Optidrive must be set to terminal mode with P-12 = 0 and P-19 = 2.

5. The preset speeds are set in P-20, P-21, P-22 and P-23. The preset speeds can be set to
any value between minimum (P-02) and maximum speed (P-01)

V1.05 software only : the preset speeds can also be set to independent negative speed
values.

6. The selector switch must be mechanically linked such that the two poles are switched
simultaneously. Each switch position selects one of the four available preset speeds.

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Application Note AN 21

Using the Optidrive with remote push-buttons for speed control

• General

Some applications, especially those where an Optidrive is build into an enclosure, require the
speed of the motor to be controlled using push-buttons mounted on the front of the enclosure.
This application note describes how this can be implemented very simply.

Note : Applies only to software version 1.05 and any later versions.

• Wiring details :
Pin 1 : 0V
STOP (N.C.) Pin 2 : Digital input 1
Pin 3 : Digital input 2
START (N.O.) Pin 4 : Digital input 3
(2-pole)

SPEED ↑ (N.O.)
11-way Optidrive
SPEED ↓ (N.O.) control terminal strip

• Notes :

7. The Optidrive must be set to keypad mode (P-12 = 1 or 2) to support this mode of
operation. If unidirectional operation is required, set P-12 = 1.

8. If speed reversal is required set P-12 = 2. The <START> button then acts as a reverse
button. Pressing this button causes the drive to run at the same speed in the opposite
direction.

9. If <STOP> is pressed, the drive will ramp down to zero and stop. Pressing <START>
once more causes the drive to ramp back up to the operational speed prior to the
<STOP> button being pressed.

10. The <START> button must have a 2-pole N.O. action.

11. For safety critical applications, place an additional enable switch between pin 1 (0V) of the
terminal strip and the push-buttons. When this switch is open, the push-buttons are
inoperative.

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Application Note AN 22

Using the Optidrive with 8 preset speeds

• General

The Optidrive can be configured to operate with any one of 8 preset speeds, 4 in a forwards
direction and the same 4 in a reverse direction. These are selected using a 2-pole, 4-position
selector switch for the 4 forwards preset speeds and an additional switch for the forwards /
reverse selection.

• Wiring details :
Pin 1 : 0V
Pin 2 : Digital input 1
Enable
Pin 3 : Digital input 2
Pin 4 : Digital input 3
3 3 3 3 Pin 5 : +10V output
1 4 1 4
Pin 6 : Analog input

11-way Optidrive
2-way, 4-pole selector control terminal strip
switch
Reverse
Switch

• Notes :

12. The Optidrive must be set to terminal mode with P-12 = 0 and P-19 = 2.

13. The preset speeds are set in P-20, P-21, P-22 and P-23. The preset speeds can be set to
any value between minimum (P-02) and maximum speed (P-01).
V1.05 software only : the preset speeds can also be set to independent negative speed
values.

14. The selector switch must be mechanically linked such that the two poles are switched
simultaneously. Each switch position selects one of the four available preset speeds.

15. Each of the 4 preset speeds can be reversed in polarity by closing a switch between
terminals 5 and 6 (connecting the analog input to +10V). This effectively provides a total
of 8 preset speeds. (Applies to V1.05 software only).

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Application Note AN 23

DC injection braking on the Optidrive

• General

DC injection braking on the Optidrive can be used to ensure that a spinning motor reaches
true zero speed before the Optidrive is disabled, or to ensure that a spinning motor is brought
to standstill prior to the output frequency of the Optidrive being increased from zero. In the
latter case, an over-current condition can be avoided.

• Notes :

16. DC injection braking is activated by entering a non-zero value into P-32. This specifies the
time for which DC-injection braking is applied after a ramp-to-stop (disable) signal has
been given by the operator, and will be applied as soon as the Optidrive output frequency
reaches zero. This can be used to ensure that the motor speed has definitely reached
zero before the output is disabled.

17. If a mechanical brake is being applied, this can be activated by using the Optidrive user
relay (terminals 10 and 11). P-19 should be set to 0 in this case.

18. The level of DC injection braking is set using P-31. This is a percentage of motor rated
voltage. Typical values lie between 5% and 20% depending on motor type.

19. In some applications (eg fans) it is possible that the motor/fan spins when the Optidrive is
disabled due to airflow through the fan blades. In this case, the Optidrive will start onto a
spinning motor. To avoid possible over-current trips, the motor speed should be brought
to zero before the Optidrive output ramps up in frequency. This is achieved by setting P-
33 = 1 (DC injection braking on drive enable).

20. When P-33 = 1, DC injection braking will be applied for the time set in P-32 with a voltage
level as set in P-31 on both enable and disable (start and stop) commands to the
Optidrive.

Typical applications

• Ensuring that a motor has stopped prior to applying a mechanical brake.

• Stopping a free-spinning motor prior to ramping up the output frequency of the Optidrive,
thereby preventing a possible Optidrive over-current trip.

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Application Note AN 24
Master / Slave operation using the Optical Link

• General
For applications that require digital Master / Slave speed following, the Optidrive offers a very
easy solution using optical communications. A Master / Slave system requires one Master
Optidrive to which any number of slaves (unlimited) are connected using OptiLink, available
from Invertek Drives as a kit of parts (OptiLink kit).
When in Master mode, the Optidrive transmits its own instantaneous speed reference to all
the slaves via the OptiLink. Each slave can operate at a preset ratio of the Master Optidrive
speed, using P-35 (speed reference scaling factor) to set this ratio.

• OptiLink connection details :

Master Slave 1 Slave 2 Slave 3

• Notes :
21. The standard IR window in the front of each of the Optidrives must be replaced by the
optical windows supplied with the OptiLink kit. A small screwdriver can be used to remove
the standard IR windows from the front of each Optidrive. The first Optidrive (Master) and
the last slave Optidrive should be fitted with the single hole windows. The 2-hole windows
should be used for all the slave Optidrives between the Master and last slave.
TO PREVENT THE RISK OF ELECTRIC SHOCK, THE MAINS SUPPLY MUST BE
DISCONNECTED BEFORE REMOVING THE INFRA RED WINDOWS
22. The Optical fibre should be cut cleanly to the required lengths using a
sharp craft knife and inserted into the small collets supplied with the
OptiLink kit, so that the optical fibre just protrudes beyond the bottom
of the collet. The collet with fibre inserted should then be pushed fully
into the required hole in the Optidrive IR window. 1mm
23. The Master Optidrive must have P-12 set to 3 (Master terminal mode). All the slaves
should have P-12 = 1 or 2, depending on whether or not negative speed is required.
24. The relative speed of each slave with respect to the Master speed can be set using P-35.
This allows any speed ratio in the range 20% to 500%.
Each Slave drive requires a Drive Enable by connecting Pins 1-2 on the terminal strip. When
the Master drive is enabled, all slaves will enable simultaneously (if not tripped!).

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Application Note AN 25

Optidrive communications protocol

Revision Description Release

record : Date :

Rev 1.0 Original specification 10.04.2000

Rev 1.1 Global address specification modified 13.04.2000

Drive address requires msbit set (add 128)
Examples with drive address from host corrected

Rev 1.2 Examples with Start Flag / Stop Flags and 23.01.2001
checksums corrected. Hardware communications
format description added.

Rev 1.3 Support for Optidrive V1.06 added. New ‘F’ and 06.03.2001
‘X’ commands added. Realtime operational data
added to ‘A’, ‘Z’ and ‘M’ commands.

Rev 1.4 ‘Y’ command added (V1.07). Supression of realtime 22.10.2001

data packet by setting bit 6 in the drive address
added.

Rev 1.5 Status byte for digital & analog inputs and relay 02.11.2001
output added.

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Application Note AN 25

Optidrive communications protocol

• General

All communications with the Optidrive are achieved using the optical IR port built into every
Optidrive as standard. To communicate with the Optidrive, the information must be encoded
according to the protocol described in this document and originate from an IrDA compliant
optical tranceiver.

If the application requires the use of either an Optiwand or a communications Gateway, the
users do not need to concern themselves with the details of the communication protocol. This
will be handled internally by the Gateway or Optiwand.

If, however, the user would like to communicate directly with the Optidrive, either optically or
by using an optical / RS485 adapter, the information in this document will be required.

When communicating between the Optidrive and a gateway or host system where line-of-
sight communication (as with the Optiwand) is not possible, communication is achieved using
an optical adapter, optical polymer fibre and either a gateway or host controller.

• Communications protocol overview

− The communications protocol ASCII based, operating at 9600 bps. Each transmitted
byte consists of a Start bit (1), 8 Data bits (LSB first) and a Stop bit (0).

− Each Optidrive acts as a slave unit any will only transmit data in response to a request
from the Host / master.

− Up to 63 drive addresses are permitted, allowing 63 Optidrives to be connected to the

same optical communication link.

− Global telegrams are permitted allowing simultaneous data transfer to multiple drives

− All operations that are supported by the Optiwand can also be carried out via a Gateway
or external host controller.

− When data is received by an Optidrive, it will be actioned immediately. All operations can
be carried out transparently whilst the Optidrive is driving a motor with the exception of a
parameter set download operation. Individual parameters can be changed during drive
operation.

− All transmitted bytes other than the START and STOP flags, including all commands and
the data checksum are send as ASCII codes. For example, a download command (‘D’ =
0x44 (hex)) is sent as two consecutive ASCII codes ie 0x34, 0x34. Further examples will
be shown in the following section.

− Any non-ASCII byte received other than the START / STOP flags will terminate the data
reception and a new sequence must be started.

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• Communications protocol details

Master (Host controller) transmit data packet format :

All transmissions originating from a Host controller must have the following format :

FG1 [DA] [CMD] ([DATA]) [CS] FG2

Where FG1 = Start Flag 0x7E, flags start of data transmission

DA = Drive Address * valid addresses { 1 … 63 }

CMD = Master Command ‘R’ (0x52) Run command

‘S’ (0x53) Stop command

**see note below ‘A’ (0x41) Motor current request

**see note below ‘Z’ (0x5A) Speed request in Hz
**see note below ‘M’ (0x4D) Speed request in RPM

(Optidrive must be stopped) ‘D’ (0x44) Download param set

‘U’ (0x55) Upload request
‘O’ (0x4F) Individual parameter edit
(Optidrive V1.07 or later) ‘Y’ (0x59) Individual parameter upload

**see note below ‘T’ (0x54) Drive Status request

‘V’ (0x56) Software version request
(Optidrive V1.06 or later) ‘X’ (0x58) Drive reset request
(Optidrive V1.06 or later) ‘F’ (0x46) Load factory default parameters

Keypad mode only (P-12 = 1 or 2) ‘P’ (0x50) Set new speed in Hz

Keypad mode only (P-12 = 1 or 2) ‘I’ (0x49) Increase speed on ramp
Keypad mode only (P-12 = 1 or 2) ‘L’ (0x4C) Reduce speed on ramp

DATA = transmitted data data will depend on command send

CS = data checksum calculated at the time of transmission and

is the logical NOT of the byte result of the
byte addition of all transmitted ASCII bytes
excluding the START and STOP flags and
the checksum itself.
i.e. ~(DA + CMD + ([DATA]))

FG2 = Stop flag 0x7F, flags end of data transmission

* For communication with the Optidrive from a Host controller, add the value 128 to the drive
address. This distinguishes between Optiwand and Host controller communications

** When an ‘A’, ‘Z’, ‘M’, ‘P’ or ‘T’ command is issued, the data returned by the Optidrive
differs depending on the Optidrive software version.

For version 1.05, the Optidrive returns the Motor current (‘A’ command), the Motor
frequency (‘Z’ command) or the motor speed in RPM (‘M’ command).

For version 1.06, the Optidrive returns the above data, but additionally the following
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operational Optidrive values in the folllowing list are appended :

For version 1.07, the following data can be suppressed by adding 64 to the drive
address (ie setting bit 6 of the address). Note that address 7 + 64 equates to the
global drive address and will result in a global action.

Speed in RPM (16-bit word)

Speed in Hz (16-bit word)
Motor current in Amps (16-bit word)
Scaled analog input (P-00 2) (16-bit word)
Target motor speed (P-00 3) (16-bit word)
Optidrive thermistor value (P-00 9) (8-bit byte)
Applied Motor voltage (P-00 7) (8-bit byte)
Fault log data (16-bit word)
** Status of digital & analog inputs, relay output (8-bit byte)

** When the ‘T’ command is used and the drive address has bit 6 set (ie 64 added), the
above data is suppressed. Only the “digital input status byte” is returned.

[ ** This information only returned with V1.07 Optidrive software]

Examples :

1. Send Run Command to Drive number 01 from intelligent host (P-12 = 1 or 2) :

The required data transmission will be

0x7E, 0x38, 0x31, 0x35, 0x32, 0x32, 0x46 0x7F

Start Drive number Command Checksum Stop

Flag (128 + 01) (0x2F) Flag

2. Send new target speed of 40.0Hz from intelligent host to drive 05 in keypad mode :

The required data transmission will be

0x7E, 0x38, 0x35, 0x35, 0x30, 0x30, 0x39, 0x36, 0x30, 0x35, 0x45 0x7F

Start Drive number Command Target Speed (40.0Hz) Checksum Stop

Flag (128 + 05) (‘P’) (2400 = 0x0960 sent) (0x5E) Flag

Note that the transmitted speed in Hertz is always 60x the speed required. Therefore 40Hz is
transmitted as 40.0 x 60 = 2400. The high byte is transmitted first. A word (16-bit) value is
always transmitted.

Checksum = logical NOT ∑(0x38, 0x35, 0x35, 0x30, 0x30, 0x39, 0x36, 0x30) = 0x5E

Note that the checksum is the least significant byte of the result.

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Global commands (to multiple Optidrives)

Some applications require particular commands to be sent simultaneously to multiple
Optidrives. An example of this would be a RUN command or a STOP command.

Global commands are sent by using the ASCII code for ‘G’ (0x47) as the drive address.
All Optidrives receiving a command following this drive address will carry out this command.

There is no reply from the Optidrives to a global command.

Example :

1. Send a Run Command to all Optidrives from intelligent host (P-12 = 1 or 2) :

The required data transmission will be

0x7E, 0x34, 0x37, 0x35, 0x32, 0x32, 0x44 0x7F

Start Global drive Command Checksum Stop

Flag Address (‘G’) (‘R’) (0x2D) Flag
= 0x47

Slave (Optidrive) reply data packet format :

Whenever a valid data packet is received by the Optidrive, the response will have a format
defined by the following information.

Note that if a valid data packet is received with an incorrect (different) drive address, the
Optidrive will ignore the data and no response at all will be generated.

All responses to valid commands will be the lower case equivalent to the command received.
For example, if a ‘R’ command is received by the Optidrive, it will respond with an ‘r’ reply.

Format of the Optidrive response :

FG1 [DA] [REPLY] ([DATA]) [CS] FG2

Where FG1 = Start Flag 0x7E, flags start of data transmission

DA = Drive Address returns its own Drive address

REPLY = Slave reply ‘r’ (0x72) Run command executed

‘s’ (0x73) Stop command executed

‘a’ (0x61) Motor current

‘z’ (0x7A) Speed request in Hz
‘m’ (0x6D) Speed request in RPM

‘d’ (0x64) New Param set loaded

‘u’ (0x75) Param set returned
‘o’ (0x6F) Param edit successful
‘y’ (0x79) Param value returned

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‘t’ (0x74) Drive Status returned

‘v’ (0x76) Software version returned
‘x’ (0x78) Drive reset completed
‘f’ (0x66) Factory defaults loaded

‘p’ (0x70) New speed in Hz loaded

Keypad mode only (P-12 = 1) ‘i’ (0x69) Increase speed actioned
‘l’ (0x6C) Reduce speed actioned

‘e’ (0x65) Error – command not executed

(error code gives reason why)

DATA = requested data data will depend on the command received

CS = data checksum calculated at the time of transmission and

is the logical NOT of the byte result of the
byte addition of all transmitted ASCII bytes
excluding the START and STOP flags and
the checksum itself.
i.e. ~(DA + REPLY + ([DATA]))

FG2 = Stop flag 0x7F, flags end of data transmission

Examples :

1. Run Command to Drive number 01 carried out (P-12 = 1 or 2) :

The resulting reply data transmission will be

0x7E, 0x30, 0x31, 0x37, 0x32, 0x33, 0x35 0x7F

Start Drive number Reply (‘r’) Checksum Stop

Flag Flag

2. New target speed of 40.0Hz set in drive 05 :

The resulting reply data transmission will be

0x7E, 0x30, 0x35, 0x37, 0x30, 0x33, 0x33, 0x7F

Start Drive number Reply (‘p’) Checksum Stop

Flag Flag

Optidrive response to a drive status request

In the event of the Optidrive status being requested, the returned data will have the following
format :

[Start Flag], [Drive Addr], [‘t’], [status], ([trip code]), [checksum], [stop flag]

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The status byte can have the following values :

0x00 Drive stopped

0x01 Drive running
(V1.06 or later) 0x02 Drive in Standby
0x09 + Trip code Drive tripped, trip code indicates fault

The possible status / trip codes are shown in the following list :

0x00 Over-current trip

0x01 Short circuit on brake resistor circuit
0x02 Internal memory chip fault
0x03 External trip
0x04 Over-voltage trip
0x05 Under-voltage trip
0x06 Over-temperature trip
0x07 Internal thermistor failure
0x08 Analog input fault – voltage mode
0x09 Default parameters loaded
0x0A Current overload trip (I x t)
0x0B Analog input fault – current mode
0x0C Thermal overload in braking resistor
0x0D Internal Power Stage trip
0x0E Serial Communications trip
0x0F Phase Loss trip

Status of digital & analog inputs, relay output status (applies to V1.07 only)

The status of the analog inputs will be returned in the following cases :

1. As part of the real-time data returned after the ‘A’, ‘Z’, ‘M’ and ‘T’ commands, provided
that bit 6 is not set (if bit 6 is set, the real-time data is suppressed)

2. If bit 6 is set, sending the ‘T’ command will result in the drive status being returned
followed by the status of the digital & analog inputs and the relay output status, encoded
in a single byte.

The digital input status byte is defined as follows :

Bit 7 : Digital input 1 (set to 1 if input active)

Bit 6 : Digital input 2 (set to 1 if input active)
Bit 5 : Digital input 3 (set to 1 if input active)
Bit 4 : Analog input (set to 1 if input voltage > 5V)
Bit 3 : Unused
Bit 2 : Unused
Bit 1 : Unused
Bit 0 : Relay output status (set if relay contacts closed)

Example :

1. Optidrive Status information requested for drive 12 :

The Optidrive returns a “drive tripped” message with an over-current fault code :
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0x7E, 0x30, 0x43, 0x37, 0x34, 0x30, 0x39, 0x30, 0x36, 0x35, 0x32, 0x7F

Start Drive number Reply Optidrive Over temp Checksum Stop

Flag (‘0x0C’) (‘t’) tripped trip code Flag

2. Optidrive Status information requested for drive 2, real time data suppressed, message
sent from host controller (128 and 64 added to drive address) :

The transmitted message will be :

0x7E, 0x43, 0x32, 0x37, 0x34, 0x31, 0x46, 0x7F

Start Drive number Command Checksum Stop

Flag (‘0xC2’) (‘T’) (0x1F) Flag

The Optidrive returns the following status information :

0x7E, 0x43, 0x32, 0x37, 0x34, 0x30, 0x31, 0x38, 0x31, 0x35, 0x35, 0x7F

Start Drive number Reply (‘t’) Optidrive Digi in 1 active Checksum Stop
Flag (‘0xC2’) running Relay closed (0x55) Flag

Optidrive response to an error condition

Whenever the Optidrive receives a command that it either does not recognise or it cannot
carry out, it will respond with an error message, indicating that an error has occurred and
what the reason for the error was.

In the event of an error occurring, the message will have the following format :

[Start Flag], [Drive Addr], [‘e’], [error code], [checksum], [stop flag]

The error code will have one of the following values :

0x02 Drive in Standby (status information)

0x91 Optidrive not in keypad mode

0x92 Optidrive speed in RPM not available (P-10 = 0)
0x93 Optidrive running – command cannot be carried out
0x94 Optidrive stopped – command cannot be carried out
0x95 Invalid data – incorrect checksum
0x96 Reserved for OptiStore
0x97 Invalid command – command not recognised
0x98 Optidrive parameters locked – command cannot be carried out
0x99 Optidrive hardware enable not present
0x9A Optidrive tripped

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Example :

1. Download operation could not be carried out – Optidrive number 18 running :

The Optidrive returns a “drive running” message :

0x7E, 0x31, 0x32, 0x36, 0x35, 0x39, 0x33, 0x43, 0x35, 0x7F

Start Drive number Reply (‘e’) Optidrive Checksum Stop

Flag (‘0x12’) running (0xC5) Flag

Uploading and Downloading parameter sets / Editing parameters

The standard Optidrive communications protocol supports parameter set transfer both as a
Download operation (transfer to Optidrive) and as an Upload operation (transfer from
Optidrive).
In addition, individual parameters can be edited (Optidrive software V1.05 or later).

Download operations

Prior to carrying out a download operation, the Host controller must request the software
version from the Optidrive. This has been implemented to ensure compatibility with possible
future products.

This is achieved by sending the following data :

0x7E [DA] [‘V’] [CS] 0x7F

the Optidrive will respond with the following data :

0x7E [DA] [‘v’] [VERSION ] [CS] 0x7F

All Optidrives with V1.05 software will respond with a value in the range 150 to 159 (decimal),
where the least significant digit represents possible variants of the V1.05 software release. All
of these will operate in exactly the same way from a communications viewpoint.

Note that early versions of the Optidrive (V1.04 and earlier) will not respond to the Version
command. All Optidrives produced since February 2000 will be fitted with V1.05 software. If a
download operation to an earlier version is needed, please contact Invertek Drives for further
information. In general, this should not be required.

Once the software version has been identified, the parameter set can be downloaded to the
Optidrive.

The data transfer format for a download operation is as follows :

0x7E [DA] [‘D’] ([PARAM SET]) [CS] 0x7F

All the parameters within a parameter set are transferred sequentially. This sequence must
be maintained at all times, otherwise data loss may occur.

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As with all other data transfer, each byte of the parameter set is converted into two ASCII
values prior to transmission.

The exact format of the parameter set is defined in an additional application note (AN26 –
Parameter Set Data format)

If a parameter set is downloaded whilst an Optidrive is running, an error message will be

generated an the parameter set will be discarded. The Optidrive must be stopped for a data
set to be accepted.

Upload operations

An upload operation can take place at any time, also when the Optidrive is running. This
operation is carried out by issuing the Upload (‘U’) command as follows :

0x7E [DA] [‘U’] [CS] 0x7F

The Optidrive with the correct Drive address will respond by sending its own complete
parameter set formatted in exactly the same way as with a download operation. This will be
as follows :

0x7E [DA] [‘u’] ([PARAM SET]) [CS] 0x7F

The format of the parameter set is detailed in application note AN26 - Parameter Set Data
format.

Individual Parameter Edit

Some applications require that a host controller can change individual parameters during
Optidrive operation. This can be achieved using the ‘O’ command, with the exception of
parameters P-09 (motor rated frequency) and P-17 (switching frequency). Any attempt to
change these parameters when the drive is running will result in an error message being
returned by the Optidrive.

The individual parameter edit operation is carried out as follows :

0x7E [DA] [‘O’] [PARAM VALUE] [PARAM NUMBER] [CS] 0x7F

The parameter value is a 16-bit value with the high byte transmitted first. The parameter
number is a byte value representing the number of the parameter to be edited.

Example :

1. Change parameter P-01 to 60.0Hz in Optidrive number 02 from intelligent host :

The transmitted data would be as follows :

0x7E, 0x38, 0x32, 0x34, 0x46, 0x30, 0x45, 0x31, 0x30, 0x30, 0x31, 0x45, 0x34, 0x7F

Start Drive num Command New Param value Param Num Checksum Stop
Flag (‘0x02’) (‘O’) (3600 = 0x0E10) (0x01) (0xE4) Flag
+128

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Note that the value transmitted representing any value in Hz is 60x that value in Hz. For
60.0Hz, the value transmitted is 3600 (0x0E10).

Individual Parameter Upload (requires Optidrive V1.07 or later)

To complement the ‘O’ command, an individual parameter can be uploaded using the ‘Y’ command.

The individual parameter upload operation is carried out as follows :

0x7E [DA] [‘Y’] [PARAM NUMBER] [CS] 0x7F

The parameter number is an 8-bit value representing the number of the parameter to be
edited.

The reply to this command will be as follows :

0x7E [DA] [‘y’] [PARAM VALUE] [PARAM NUMBER] [CS] 0x7F

The parameter value is a 16-bit value with the high byte transmitted first. The parameter
number is a byte value representing the number of the parameter returned.

Example :

1. Get value of parameter P-01 in Optidrive number 02 from intelligent host :

The transmitted data would be as follows :

0x7E, 0x38, 0x32, 0x35, 0x39, 0x30, 0x31, 0x43, 0x36, 0x7F

Start Drive num Command Param Num Checksum Stop

Flag (‘0x02’) (‘Y’) (0x01) (0xC6) Flag
+128

The response to the above command will be :

0x7E, 0x38, 0x32, 0x37, 0x39, 0x30, 0x45, 0x31, 0x30, 0x30, 0x31, 0x45, 0x45, 0x7F

Start Drive num Command Returned value Param Num Checksum Stop
Flag (‘0x02’) (‘y’) (3600 = 0x0E10) (0x01) (0xEE) Flag
+128

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Further examples :

1. Start all drives :

0x7E, 0x34, 0x37, 0x35, 0x32, 0x32, 0x44 0x7F

Start Global drive Command Checksum Stop

Flag Address (‘G’) (‘R’) (0x2D) Flag
= 0x47

(Global drive address commands are received by all slaves)

2. Reverse direction of all drives (P-12 = 2):

0x7E, 0x34, 0x37, 0x35, 0x32, 0x32, 0x44 0x7F

Start Global drive Command Checksum Stop

Flag Address (‘G’) (‘R’) (0x2D) Flag
= 0x47

(Sending a run command to an already running drive reverses direction if P-12 = 2)

3. Stop all drives :

0x7E, 0x34, 0x37, 0x35, 0x33, 0x32, 0x43 0x7F

Start Global drive Command Checksum Stop

Flag Address (‘G’) (‘S’) (0x2C) Flag
= 0x47

(All drives action the command if drive address is global (“G”))

4. Send new speed of 40.0Hz to drive number 5 :

0x7E, 0x38, 0x35, 0x35, 0x30, 0x30, 0x39, 0x36, 0x30, 0x35, 0x45 0x7F

Start Drive number Command Target Speed (40.0Hz) Checksum Stop

Flag (128 + 05) (‘P’) (2400 = 0x0960 sent) (0x5E) Flag

(Note that transmitted value is 60x speed in Hz ie 60x 40.0 = 2400)

5. Change value of parameter P-35 in drive number 2 to 120% :

0x7E, 0x38, 0x32, 0x34, 0x46, 0x30, 0x30, 0x37, 0x38, 0x32, 0x34, 0x45, 0x36, 0x7F

Start Drive num Command New Param value Param Num Checksum Stop
Flag (‘0x02’) (‘O’) (120 = 0x0078) (35 = 0x24) (0xE6) Flag
+128

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Application Note AN 27
Roller-shutter door control using the Optidrive

• General
The Optidrive can be used to control the opening and closing of a roller-shutter door using
two push-buttons and two limit switches. If the operator needs to be able to stop the door
before it is fully open or fully closed, an additional switch can be fitted to achieve this.

This feature requires V1.05 Optidrive software or later.

• Wiring details :

Upper Limit
Switch (N.C.)
Pin 1 : 0V

Push button 1 (N.O.) Pin 2 : Digital input 1

(Close Door)
Pin 3 : Digital input 2
Lower Limit Pin 4 : Digital input 3
Switch (N.C.)

Push button 2 (N.O.)

(Open Door)

11-way Optidrive
control terminal strip

• Notes :

25. The Optidrive should be connected as shown in the above wiring diagram.

26. Push buttons 1 and 2 are momentary action Normally Open (N.O.) switches. These are
used to open and close the roller-shutter door.

27. Limit switches (N.C. – Normally Closed) must be positioned so that they open when the
roller-shutter door reaches the end of its travel, either fully open or fully closed.

28. If an additional Stop switch is required to stop the roller-shutter door before it is fully open
or closed, place a momentary action normally closed switch (N.C.) in series with the limit
switches.

29. Set P-03 and P-04 to the acceleration / deceleration ramp times to reach full speed.
Typical values will be 0.5s.

30. Set P-02 to the required operational (open / close) speed.

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Application Note AN 28
Upgrading the Optiwand using OptiStore

• General
To maximise flexibility and future compatibility, the Optiwand has been designed to be upgradable
using its InfraRed communication link and a PC fitted with an Optimouse. To be able to upgrade the
Optiwand, OptiStore must be running on the PC and an official Optiwand upgrade file must be present
on the hard disk of the PC. The upgrade files are available periodically from Invertek Drives Ltd.

• Procedure :

Launch OptiStore on a PC with an Optimouse connected to one of the communication ports

(eg COM1). Ensure that this port is selected in OptiStore. Place the Optiwand on a flat
surface between 30 and 50cm from the Optimouse, pointing the IR window towards the
Optimouse.
Select "Advanced" in the Main Menu and press the NAVIGATE key on the Optiwand. Now
press the UP key so that the Optiwand displays "Upgrade Firmware" on its display. Press the
NAVIGATE key once to display "Confirm Upgrade ? No". Use the UP key to change to "Yes"
and then press NAVIGATE once more.

A file select window will now be displayed by OptiStore on the PC. An upgrade file should
now be selected and the "Open" button clicked on the PC. Note that only officially distributed
upgrade files should be used and that any unofficial / corrupted files will be rejected by the
upgrade verification checks.

Once the file has been selected, the Upgrade process is automatically started. A progress
indicator in the OptiStore window provides an indication as to how much of the file has been
transferred. Data transfer will be complete after 3 minutes approx.

Once transferred, the Optiwand carries out verification checks before starting the Upgrade
process automatically. It is essential that the batteries are not removed during this process
otherwise permanent data loss will result and the Optiwand will be unusable.

The software version in the Optiwand can be checked by entering "Advanced mode" on the
Optiwand (press NAVIGATE from the Main Menu when Advanced mode is selected) and
then pressing and holding the UP and DOWN keys simultaneously for 1s.

Pressing and holding NAVIGATE exits from any of the above procedures.

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Application Note AN 29
RS485 applications using the Optidrive
• General
Where applications require the Optidrives to be inter-connected with either a 2- or 4-wire RS485 link, or
where other drive support equipment (eg OptiPort, 3rd party controllers etc) need to be connected to
the Optidrive, the RS485 communications module can be used. This is connected to the Optidrive to
convert the data transmissions from an optical to an RS485 format.
Note that in all cases, the Optibus communications protocol must be observed. This is available
separately in Application Note AN25.

• RS485 wiring guidelines :

1 TX \
2 TX
IR tranceiver 3 0V
1 2 3 4 5 6 4 RX \
RS485 5 RX
6 0V
1 2 3 4 5 6 7 8 9 10 11
Option module 6-way connector
4-wire operation :
This mode of operation is suited to applications where typically a host controller forms the
Master, sending information down to a group of slave Optidrives. Only the Master can
initiate transmissions. Slave Optidrives respond only when requested to do so by the
Master controller. Connect the RS485 network as follows :
Master All Slaves
Pin 1 ßà Pin 4 * In general, the 0V
Pin 2 ßà Pin 5 connection is not
(Pin 3 ßà Pin 3) * required, such that
Pin 4 ßà Pin 1 terminals 3 and 6 do
Pin 5 ßà Pin 2 not need to be
(Pin 6 ßà Pin 6) * connected.

The Master controller can then send commands to all or any of the slaves. In this type of
application, each slave must have a unique drive address to avoid data clashes.

For applications where the RS485 data cable exceeds 25m, it may be beneficial to fit a
termination resistor. In such cases, a 220R resistor should be placed across pins 4 and 5
at each end of the communication link. Optidrives in the middle of the RS485 link do not
need termination resistors.

2-wire operation :
For 2-wire operation, connect pins 1 to 4 and similarly pins 2 to 5 on each RS485 module.
Inter-connect the RS485 modules as follows :
Master All slaves * In general, the 0V
connection is not required,
Pins 1 and 4 ßà Pins 1 and 4 such that terminals 3 and
Pins 2 and 5 ßà Pins 2 and 5 6 do not need to be
(Pins 3 and 6) ßà (Pins 3 and 6) * connected.
As in the case of 4-wire operation, it may be beneficial to fit a 220R termination resistor to
each end of the RS485 link (across pins 1 and 2) for cable lengths above 25m.

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Application Note AN 30
PI control using the OptiPort

• General
In addition to providing a remote keypad facility for the Optidrive, the OptiPort offers a flexible
PI controller that can be used for a variety of process control applications. This document
describes the setup procedure for each of the operating modes available.

PI control using the OptiPort requires V1.06 (or later) Optidrive software.

• PI controller operating mode selection :

The PI controller mode is set using P-47 in the OptiPort :

P-47 = 0 : Direct PI control, where increasing the speed of the motor increases the feedback
signal. Typical examples include :
Pressure control, where the Motor drives the compressor
Flow rate control, where the motor drives the pump.

P-47 = 1 : Direct PI control, where the PI controller uses the motor current as the feedback.
Typical examples include :
Motor Load control (approximates to torque control)

P-47 = 2 : Inverse PI control, where increasing the motor speed reduces the level of the
feedback signal. Typical applications include :
Condenser cooling fan control in refrigeration systems.

P-47 = 3 : Addition of the Optidrive and OptiPort analog signals, using the P-term for gain
control.

P-47 = 4 : Direct PI control, where the PI controller uses the motor current as the feedback
and the the speed limit is controlled by the OptiPort analog input value.

• P-47 = 0 : Direct PI control with analog feedback

P-47 = 2 : Inverse PI control with analog feedback

1. Set the OptiPort analog input format to suit the signal from the feedback tranducer using
parameter P-49.

2. Set P-47 to zero for applications where the feedback signal increases when the speed of
the motor increases. Set P-47 to 2 for applications where increasing motor speed results
in a reduction in the signal level from the feedback transducer.

3. Set P-46 to determine where the controller reference (set point) comes from.
Set P-46 = 0 if the reference comes from the Optidrive analog input
Set P-46 = 1 if the reference comes from the preset value (P-48 value)

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4. If the preset reference is used (P-46 = 1), set P-48 to the required level. A value of 100%
in P-48 equates to the rated value from the control transducer used for the feedback (10V
or 20mA).

5. If desired, the OptiPort display can be set up to show the value measured by the feedback
transducer in meaningful units. Depending upon application, this could represent
pressure, temperature, flow rate etc.
To set this up, set P-42 to 1 and P-41 as follows :

P-41 value (scaling factor) = required display value at maximum analog input value
1200

eg if 150oC corresponds to 20mA on a 4..20mA transducer, set P-41 to 150 / 1200 =

0.125.

When enabled, the OptiPort will display Hz, A and rpm as in the case of the Optidrive and
will additionally show the scaled value (indicated by a “c” on the left-hand side of the
display) whenever P-41 has a non-zero value.

6. The PI controller is activated when the P-gain (P-43) and the I-Gain (P-44) are set to non-
zero values. Note that when the PI controller is activated, the Optidrive is automatically
set to keypad mode (P-12 = 1). This is necessary for the PI controller in the OptiPort to be
able to control the speed of the Optidrive.

7. The settings of P-43 and P-44 are related directly to the application. P-43 determines
how tightly the PI controller tries to correct any error ie variance from the set point. A
value of 5 is a good starting point for pressure and temperature control.
P-44 is related to the time constant or speed of response of the quantity being controlled.
In general, pressure control is moderate and responds in a few seconds – a setting of 3 or
4s will be a good starting point. Temperature control is usually less dynamic and may
require settings of several 10’s of seconds.

• P-47 = 1 : PI control with motor current feedback

P-47 = 4 : PI control with motor current feedback, variable speed limit

1. When P-47 = 1 or 4, the feedback is automatically linked to the motor current (internally).

2. Set P-46 to determine where the controller reference (set point) comes from.
Set P-46 = 0 if the reference comes from the Optidrive analog input
Set P-46 = 1 if the reference comes from the preset value (P-48 value)

3. If the preset reference is used (P-46 = 1), set P-48 to the required level. A value of 100%
in P-48 equates to the rated motor current, as set in P-08.

4. If the speed output limit of the PI controller is to be varied, this is done via the OptiPort
analog input. In this case, the speed limit is varied linearly between 0 and P-01 as the
analog input value varies between 0 and 10V.

5. This mode of operation can be used for load control where high dynamic response is not
required. The control works better for larger motors (broadly above 2kW), since changes
in the load are reflected more closely by changes in motor current.

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6. The PI controller is activated when the P-gain (P-43) and the I-Gain (P-44) are set to non-
zero values. Note that when the PI controller is activated, the Optidrive is automatically
set to keypad mode (P-12 = 1). This is necessary for the PI controller in the OptiPort to be
able to control the speed of the Optidrive.

7. The settings of P-43 and P-44 are related directly to the application. P-43 determines
how tightly the PI controller tries to correct any error ie variance from the set point. Since
load variations may be relatively fast, a good starting point for P-43 would be 1s.
P-44 is related to the time constant or speed of response of the quantity being controlled.
In general, pressure control is moderate and responds in a few seconds – a setting of 3 or
4s will be a good starting point. Temperature control is usually less dynamic and may
require settings of several 10’s of seconds.

• P-47 = 3 : Addition of OptiPort and Optidrive analog input values

1. Setting P-47 = 3 results in the Optidrive speed reference being formed by the sum of the
OptiPort and Optidrive analog inputs.

2. The format of the analog inputs can be set independently using P-16 and P-49 for the
Optidrive and OptiPort respectively.

3. In general, set P-43 = 1 and P-44 = 0 to achieve addition with unity gain.

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Application Note AN 32
PI control using the OptiPort
Author : David Jones, R&D Director, Invertek Drives Ltd

• General
In addition to providing a remote keypad facility for the Optidrive, the OptiPort offers a flexible
PI controller that can be used for a variety of process control applications. This document
describes the setup procedure for each of the operating modes available.

PI control using the OptiPort requires V1.06 (or later) Optidrive software.

Note : this Application Note relates to OptiPort software version 1.03 or later. For
OptiPort version 1.02 or earlier, please refer to Application Note AN30.

• PI controller operating mode selection :

The PI controller mode is set using parameters P-45 and P-47 in the OptiPort.

In all cases, the P-45 allows the user to select either direct PI control, where an increase in
the speed of the motor increases the feedback value, or to select inverse mode, where an
increase in the speed of the motor reduces the feedback value.

Hence, P-45 = 0 Direct mode

P-45 = 1 Inverse mode

The source of the feedback is selected using P-47. If the signal comes from an external
transducer, this is connected to the analog input of the Optiport.

If the source of the feedback originates from the Optidrive (eg motor current feedback), the
feedback value is obtained directly via the optical (serial) communication link and no
additional connection is required.

P-47 = 0 : PI control using the OptiPort analog input as the feedback value. The analog
input can be configured to suit the feedback transducer (eg 4..20mA) using
P-49.
Typical examples include :
Pressure control, where the Motor drives the compressor
Flow rate control, where the motor drives the pump
Temperature control, where the motor drives a fan.
Condenser cooling fan control in refrigeration systems (inverse mode).

P-47 = 1 : PI control using the motor current as the feedback value. This value is
obtained directly from the Optidrive via the optical link. No wired connections
for the feedback are necessary.
Typical examples include :
Motor Load control (approximates to torque control)

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The following settings for P-47 allow PI control to be implemented, but the maximum or
minimum speed limits can be varied using the Optidrive analog input. In all cases, varying the
analog input from 0 to 10V varies the speed limit from 0 to setting of P-01.

P-47 = 2 : PI control using the OptiPort analog input for the feedback input as in the case
of P-47 = 0, but the Optidrive analog input is used to dynamically vary the
maximum speed limit. This effectively acts as a variable limit for the PI
controller output.

P-47 = 3 : PI control using the OptiPort analog input for the feedback input as in the case
of P-47 = 0, but the Optidrive analog input is used to dynamically vary the
minimum speed limit. This effectively acts as a variable limit for the PI
controller output.

P-47 = 4 : PI control using the Optidrive motor current for the feedback value as in the
case of P-47 = 1, but the Optidrive analog input is used to dynamically vary the
maximum speed limit. This effectively acts as a variable limit for the PI
controller output.

P-47 = 5 : PI control using the Optidrive motor current for the feedback value as in the
case of P-47 = 1, but the Optidrive analog input is used to dynamically vary the
minimum speed limit. This effectively acts as a variable limit for the PI
controller output.

P-47 = 6 : PI control using the Optidrive dc bus voltage for the feedback value as in the
case of P-47 = 1, but the Optidrive analog input is used to dynamically vary the
maximum speed limit. This effectively acts as a variable limit for the PI
controller output.

P-47 = 7 : PI control using the Optidrive dc bus voltage for the feedback value as in the
case of P-47 = 1, but the Optidrive analog input is used to dynamically vary the
minimum speed limit. This effectively acts as a variable limit for the PI
controller output.

In the event of the user wishing to add the analog inputs of the OptiPort to that of the
Optidrive (analog input summation), this can be achieved by setting P-45 = 2. In this case, it
is usual to set the integraI gain to zero (ie P-44 = 0). If unity gain for the summation is
required, set the proportional gain to 1 (ie P-43 = 1).

Summary :

P-45 = 0 Direct PI control

1 Inverse PI control
2 Analog input summation

P-47 = 0 PI control, OptiPort analog input feedback, speed limits fixed.

1 PI control, Optidrive motor current feedback, speed limits fixed .
2 PI control using the OptiPort analog input for feedback, variable max speed
limit
3 PI control using the OptiPort analog input for feedback, variable min speed
limit
4 PI control, Optidrive motor current feedback, variable max speed limit
5 PI control, Optidrive motor current feedback, variable min speed limit
6 PI control, Optidrive DC bus voltage feedback, variable max speed limit
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7 PI control, Optidrive DC bus voltage feedback, variable min speed limit

Application Examples :

• Using the condenser fan to control the pressure in a refigeration system

8. Set the OptiPort analog input format to suit the signal from the feedback tranducer using
parameter P-49 (typically 4..20mA).

9. For a 2-wire 4..20mA transducer, connect the +ve terminal of the transducer to the +24V
supply and the –ve terminal of the transducer to terminal P3 of the OptiPort.

10. Set P-45 = 1 to select the inverse PI control mode. This ensures that as the feedback
signal falls (pressure drops), the speed of the fan also falls.

11. Set P-47 = 0 to select PI control using the OptiPort analog input

12. Set P-46 to determine where the controller reference (set point) comes from.
Set P-46 = 0 if the reference comes from the Optidrive analog input
Set P-46 = 1 if the reference comes from the preset value (P-48 value)

13. If the preset reference is used (P-46 = 1), set P-48 to the required level. A value of 100%
in P-48 equates to the rated value from the feedback control transducer (10V or 20mA).

14. If desired, the OptiPort display can be set up to show the value measured by the feedback
transducer in meaningful units. Depending upon application, this could represent
pressure, temperature, flow rate etc.
To set this up, set P-42 to 1 and P-41 as follows :

P-41 value (scaling factor) = required display value at maximum analog input value
1200

eg if 150oC equates to 20mA on a 4..20mA transducer, set P-41 to 150 / 1200 = 0.125.

Whenever P-41 has a non-zero value, the OptiPort will display Hz, A and rpm as in the
case of the Optidrive and will additionally show the scaled value (indicated by a “c” on the
left-hand side of the display).

15. The PI controller is activated when the P-gain (P-43) and the I-Gain (P-44) are set to non-
zero values. Note that when the PI controller is activated, the Optidrive is automatically
set to keypad mode (P-12 = 1). This is necessary for the PI controller in the OptiPort to be
able to control the speed of the Optidrive.

16. The settings of P-43 and P-44 are related directly to the application. P-43 determines
how tightly the PI controller tries to correct any error ie variance from the set point. A
value of 5 is a good starting point for pressure and temperature control.
P-44 is related to the time constant or speed of response of the quantity being controlled.
In general, pressure control is moderate and responds in a few seconds – a setting of 3 or
4s will be a good starting point. Temperature control is usually less dynamic and may
require settings of several 10’s of seconds.

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• Motor load control using motor current feedback

8. Set P-47 = 1 to select motor current feedback control. Alternatively, if the speeds limits
need to be dynamically controlled set P-47 = 4 or 5). The feedback value (motor current)
is automatically obtained from the Optidrive via the optical link. No additional wiring for the
feedback is needed.

9. Depending on the application, P-45 must be set to a 0 for direct PI control (where
increasing speed increases load) or to a 1 (where increasing speed reduces load).

10. Set P-46 to determine where the controller reference (set point) comes from.
Set P-46 = 0 if the reference comes from the Optidrive analog input
Set P-46 = 1 if the reference comes from the preset value (P-48 value)

11. If the preset reference is used (P-46 = 1), set P-48 to the required level. A value of 100%
in P-48 equates to the rated motor current, as set in P-08.

12. If the speed output limit of the PI controller is to be varied dynamically, this is done via the
Optidrive analog input. In this case, the speed limit is varied linearly between 0 and P-01
as the analog input value varies between 0 and 10V. Set P-47 = 4 to control the maximum
speed limit or set P-47 = 5 to control the minimum speed limit.

13. The PI controller is activated when the P-gain (P-43) and the I-Gain (P-44) are set to non-
zero values. Note that when the PI controller is activated, the Optidrive is automatically
set to keypad mode (P-12 = 1). This is necessary for the PI controller in the OptiPort to be
able to control the speed of the Optidrive.

14. The settings of P-43 and P-44 are related directly to the application. P-43 determines
how tightly the PI controller tries to correct any error ie variance from the set point. Since
load variations may be relatively fast, a good starting point for P-43 would be 1s.
P-44 is related to the time constant or speed of response of the quantity being controlled.
In general, pressure control is moderate and responds in a few seconds – a setting of 3 or
4s will be a good starting point. Temperature control is usually less dynamic and may
require settings of several 10’s of seconds.

This mode of operation is best suited to load control where high dynamic response is not
required. The control works better for larger motors (broadly above 2kW), since changes in
the load are reflected more closely by changes in motor current.

• Programming the output relay to indicate pressure limit reached

In pressure control applications, it is often desirable to have a warning signal available via
relay contacts that indicates that a preset pressure limit has been reached. This can be used
to take precautionary action to prevent for example a system trip.

This is activated by setting P-50 = 6.

To set the trip level, press the STOP and START buttons on the Optiport keypad whilst the
value of P-50 is displayed. The display will change to show a new value with a “C” on the Left
Hand side to indicate “calibration”. This represents a percentage value between 0% and
100% and directly relates to the value of the feedback. Ie For a 4..20mA transducer, 0% =

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4mA, 100% = 20mA. Change the value of this parameter to the required warning level and
press NAVIGATE as usual to exit.

The relay contacts will switch when the feedback value >= preset warning level.

David Jones
R&D Director
Invertek Drives Ltd

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