Trouble Shooting

Table of contents
1. Action plan for Alarm & Warning

2. FAQ

2017. 10. 31
LS Mecapion Customer Support Team
ENG Ver 1.9
Table contents - Action plan for Alarm & Warning
* Please check the current alarm and warning by clicking the corresponding series.
Code Title Servo Drive Code Title Servo Drive
AL - 10 IPM fault (H/W) L7S L7N L7NH&P AL - 50 Over speed limit L7S L7N L7NH&P
AL - 11 IPM temperature L7S L7N L7NH&P
AL - 51 POS following L7S L7N L7NH&P
AL - 14 Over current (S/W) L7S L7N L7NH&P
Excessive SPD deviation - - L7NH&P
AL - 15 Current offset L7S L7N L7NH&P AL - 53
Pulse command frequency error L7S - -
AL - 16 Current limit exceeded L7S L7N L7NH&P
AL - 54 Excessive speed error L7S - -
AL - 21 Continuous overload L7S L7N L7NH&P
AL - 22 Drive temperature 1 L7S L7N L7NH&P AL - 55 Motor Over Run L7S - -
AL - 23 Regeneration overload L7S L7N L7NH&P AL - 63 Parameter checksum L7S - L7NH&P
AL - 24 Motor cable open L7S L7N L7NH&P AL - 64 Parameter Range Error L7S - L7NH&P
AL - 25 Drive temperature 2 L7S L7N L7NH&P AL - 65
AL - 66 EtherCAT Communication error - L7N -
AL - 30 Encoder communication L7S L7N L7NH&P AL - 67
AL - 71 Factory setting L7S L7N L7NH&P
AL - 31 Encoder cable open L7S L7N L7NH&P
AL - 72 Output contact setting error L7S L7N -
AL - 32 Encoder data L7S L7N L7NH&P
AL - 33 Motor setting L7S L7N L7NH&P W-01 Main power phase loss L7S L7N L7NH&P

AL - 34 Z phase open L7S L7N L7NH&P W-02 Battery low L7S L7N L7NH&P
AL - 35 Low battery L7S L7N L7NH&P W-04 Excessive torque command L7S L7N -

AL - 36 Sinusoidal ENC amplitude L7S L7N L7NH&P W-04 Software position limit - - L7NH&P
W-08 Overspeed command L7S L7N -
AL - 37 Sinusoidal ENC frequancy - - L7NH&P
W-08 Excessive DB current - - L7NH&P
AL - 38 Encoder setting - - L7NH&P
W-10 Overload warning L7S L7N L7NH&P
AL - 40 Under voltage L7S L7N L7NH&P
AL - 41 Over voltage L7S L7N L7NH&P W-20 Driver/Motor combination fail L7S L7N L7NH&P

AL - 42 Main power fail L7S L7N L7NH&P W-40 Low voltage L7S L7N L7NH&P
AL - 43 Control power fail L7S L7N L7NH&P W-80 Emergency signal input L7S L7N L7NH&P

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Table contents - FAQ
* Please click on the relevant FAQ to check and take action.

Title Servo Drive Title Servo Drive

- on the segment window L7S L7N L7NH&P - Origin position error during origin operation L7NH&P

- on the segment window L7N L7NH - Nothing displayed in the segment window L7S L7N L7NH&P

- on the segment window L7S L7N L7NH&P - Analog monitor’s output is abnormal L7NH&P

- bt 2.0 on the segment window L7S L7N L7NH&P - What is User Unit? L7NH&P
- Upper controller output pulse, but motor L7S L7P
- How to calculate speed and acceleration, L7NH&P
doesn’t run deceleration
- Servo-On isn't enable L7S L7N L7NH&P - Index operation isn’t enable even if I gave L7P
start signal
- How to change the operating direction L7S L7N L7NH&P
- How to select communication program L7S L7N L7NH&P
- Motor over run as soon as I start operation L7S L7N L7NH&P
- How to check the resolution of motor(encoder) L7S L7N L7NH&P
- Homing speed doesn’t increase L7N L7NH&P
- How to use encoder output in open collector - Parameter is unchanged L7S L7N L7NH&P
L7S L7P
mode - What is brake type motor? L7S L7N L7NH&P
- Speed doesn’t go up even if I increase speed L7S L7P
- How to wire the brake type motor L7S L7N L7NH&P
- How to set the electric gear ratio L7S L7N L7NH&P
- After auto tuning, motor doesn’t run once L7N L7NH
- I only Servo-On, but the motor is spinning L7S
- Can I input the digital input signal at + 24V L7S L7N L7NH&P
- Drive internal JOG operation isn’t available L7S instead of GND 24V?
- How to set the speed scale for the analog speed - Is torque operation possible with 422 L7S L7P
L7S L7P
operation communication?
- How to set the torque scale for the torque L7S L7P
- Is it possible to operate the position by 422 L7S L7P
operation communication?
- How to use analog speed operation L7P - Where is the analog input / output terminal L7S L7NH&P

- Jog operation isn’t available in Drive CM L7NH&P - Can I generate an overload alarm earlier? L7S L7N L7NH&P
- Position error during position operation mode L7NH&P - Can not input a value for parameter 0x6099 L7N L7NH&P

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Table contents - FAQ
* Please click on the relevant FAQ to check and take action.

Title Servo Drive

- ‘-Err-’ message occurred when setting
L7S
parameters.
- Can I adjust the speed during torque
L7S L7N L7NH&P
operation?
- How to set the encoder output scaling ratio L7S L7P

- Sequence of connector pin number L7S L7N L7NH&P

- How to use external regenerative resistor? L7S L7N L7NH&P

- How to set parameters with the drive
L7S
operation buttons
- How does the drive control button display
L7S
numbers more than 6 digits?
- How to use the analog speed override
L7P
function during index operation?
- How to wire RS-422/485 L7S

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 Overcurrent (L7S/L7N/L7NH/L7P Drive)

1) Check the basic parameter

=> Please find the motor ID(P0-00), encoder type(P0-01), encoder resolution(P0-02) on the motor label and check the
parameter setting(L7S) - Refer the mannual
=> Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting (L7N, L7NH, L7P Drive) - Refer the mannual

2) Check encoder cable for ground or short circuit.

=>Repair or replace encoder cable

3) Check power cable(U,V,W) for ground or short circuit.

=>Repair or replace power cable

3) Check for collisions during machine operation.

4) Check the mis-wiring or contact state of the regenerative resistor.

5) Reset the current offset

=> Redo the phase current offset adjustment procedure command on procedure function
or using Procedure Misc. Functions by Drive CM.
=> CN-17(Current offset) resetting (L7S Drive)
=> 0x2703, Current offset value correction (L7N Drive)

6) Replace the drive.

7) Replace the motor.

Return to List

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 IPM overheating (L7S/L7N/L7NH/L7P Drive)

 This alarm is appeared when the IGBT module power element of servo drive is overheated.

1) Keep the ambient temperature within 50 [℃]

2) Installation direction, and clearance conditions must meet the installation standards in the control panel.

3) Check the status of foreign matter inflow and DC fan failure in the cooling fan(Applicable for products 1kW or more)

4) Replace the drive.

Return to List

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 Overcurrent(S/W) (L7S/L7N/L7NH/L7P Drive)

1) AL-14 occurs when the mechanical start torque is large.

=> L7NH/L7P Drive : Torque Limit Function Select [0x2110], External Torque Limit Setting [0x2111], [0x2112] Adjustment
ex) 300.0% -> 250.0% / Lower the input value of [0x6072], [0x60E0], [0x60E1], Analog Torque

=> L7S Drive : Torque limit setting, Lower the input value of P1-13, P1-14 ex) 300.0% -> 250.0%

=> L7N Drive : External Torque Limit Setting , Lower the input value of 0x2111, 0x2112 ex) 300.0% -> 250.0%

2) Increase the acceleration / deceleration time -> Decrease the Instantaneous Max. Operation Overload.

3) Replace drive with a higher capacity product -> Increase the maximum current value.

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 Current Offset error (L7S/L7N/L7NH/L7P Drive)

1) Current offset re-setting

=>L7NH/L7P : Reset current offset if U/V/W phase current offset [0x2015]~[0x2017] is more than 20% of rated current
(7.5KW or less does not measure the W phase current)
Please follow below picture description(Drive CM)

=> L7N : Reset current offset if the U/V/W phase current offset [0x2015]~[0x2017] is more than 10% of the rated current
(7.5KW or less does not measure the W phase current)
Please connect to TwinCAT and input command “rset(72 73 65 74)”

=> L7S : Reset current offset if the U/V/W phase current offset [0x2015]~[0x2017] is more than 10% of the rated current
(7.5KW or less does not measure the W phase current)
Reset current offset(related parameter[Cn-17])
2) Replace the drive. Return to List

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 Overcurrent (H/W) (L7S/L7N/L7NH/L7P Drive)

1) Check the basic parameter.

=> Please find the motor ID(P0-00), encoder type(P0-01), encoder resolution(P0-02) on the motor label and check the
parameter setting(L7S)
=> Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting (L7N, L7NH, L7P Drive)

2) Check encoder cable for ground or short circuit.

=>Repair or replace encoder cable

3) Check power cable(U,V,W) for ground or short circuit.

=>Repair or replace power cable

4) Check for collisions during machine operation.

5) Check the miswiring or contact state of the regenerative resistor.

Return to List

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 Continuous overload (L7S/L7N/L7NH/L7P Drive)

1) Please check the U/V/W wiring for motor power cable .

=> AL-21 may appear in case of U/V/W miss-wiring

2) Check the basic parameter.

=> Please find the motor ID(P0-00), encoder type(P0-01), encoder resolution(P0-02) on the motor label and check the
parameter setting(L7S) - Refer page 2 for the related setting.
=> Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting (L7N, L7NH, L7P Drive) - Refer page 3,4 for the related setting.

3) If hunting occurs, please adjust gain parameter value.

4) If using brake type motor, check whether the brake is open or lock.

5) Check encoder cable for ground or short circuit.

6) Check for collisions during machine operation.

7) Replace the drive.

8) Replace the motor.

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 Drive temperature 1 (L7S/L7N/L7NH/L7P Drive)

 It occurs when the temperature inside the drive (power NTC) exceeds 95 [℃]

1) Keep the ambient temperature within 50 [℃]

2) Installation direction, and clearance conditions must meet the installation standards in the control panel.

3) Check the status of foreign matter inflow and DC fan failure in the cooling fan(Applicable for products 1kW or more)

4) Check if the drive temperature in common condition displays differs from the ambient temperature and replace the servo drive.
=> L7NH/L7 Drive : Drive temperature 1 parameter [0x260B]
=> L7S Drive : Internal temperature display [St-19]
=> L7N Drive : Temperature 1 parameter [0x2610]

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 Regeneration overload (L7S/L7N/L7NH/L7P Drive)

1) When using external regenerative resistor, Set the same as regeneration resistor value, regeneration resistor capacity
regeneration resistor information.

2) Check the miswiring or contact state of the regenerative resistor.

3) Check input power (within AC 253 [V])

4) Check whether the regenerative overload rate reaches 100%. When 100% is reached, use an external regenerative
resistor (option) or change the servo capacity.
=> L7NH/L7 Drive : Parameter [0x2606]
=> L7S Drive : Parameter[St-13]
=> L7N Drive : Parameter[0x260C]

5) Check the regenerative resistor Derating Factor setting is not too low.
=> L7NH/L7 Drive : Parameter [0x200A]
=> L7S Drive : Parameter [P0-09]
=> L7N Drive : Parameter [0x2006]

6) Measure the regenerative resistance value to make sure it is the same as the specification
=> If only the power supply voltage is input in the normal range, replace the servo drive when the regenerative resistor
generates heat

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 Motor cable open(L7S/L7N/L7NH/L7P Drive)

1) Check whether motor power cable is disconnected.

2) Check if there is a short bar between PO PI of servo drive.

3) Replace the motor.

4) Replace the drive.

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 Drive temperature 2 (L7NH/L7P Drive)

 It occurs when the temperature inside the drive (main MCU) exceeds 90 [℃]

1) Keep the ambient temperature within 50 [℃]

2) Installation direction, and clearance conditions must meet the installation standards in the control panel.

3) Check the status of foreign matter inflow and DC fan failure in the cooling fan(Applicable for products 1kW or more)

4) Check if the drive temperature in common condition displays differs from the ambient temperature and replace the servo drive.
=> L7NH/L7 Drive : Drive temperature 1 parameter [0x260B]
=> L7S Drive : Internal temperature display [St-19]
=> L7N Drive : Temperature 1 parameter [0x2610]

Return to List

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 Encoder communication Encoder data (L7S Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting.
=> Set the parameters as follow

1. If putting ID, motor parameter is automatically set

2. Motor ID is on the motor label.

Encoder Type [P0-01]

Encoder pulse 1 .Applied Encoder pulse per revolution

per revolution [P0-02] 2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution

Incremental type: set the pulse per revolution

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.6 Quadrature Quadrature encoder signal (CN2) wiring 3.7 Serial encoder signal (CN2) wiring
3.8 Multi-turn encoder signal (CN2) wiring
3) Noise
=> Check the specifications of the encoder cable
=> Replace with an encoder cable that meets the standards
4) Replace the motor. Return to List
5) Replace the drive.

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 Encoder communication Encoder data (L7N Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting.
=> Set the parameters as follow

1. If putting ID, motor parameter is automatically set

2. Motor ID is on the motor label.

Encoder Type [P0-01]

Encoder pulse 1 .Applied Encoder pulse per revolution

per revolution [P0-02] 2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution

Incremental type: set the pulse per revolution

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.5 Serial encoder signal (CN2) contact 3.6 Multi-turn encoder signal (CN2) wiring
3) Noise
=> Check the specifications of the encoder cable
=> Replace with an encoder cable that meets the standards
4) Replace the motor.
5) Replace the drive. Return to List

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 Encoder communication Encoder data (L7NH/L7P Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting.
1. If putting ID, motor parameter is automatically set
2. Motor ID is on the motor label.

Set Value Encoder Type

1 .Applied Encoder pulse per revolution

2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution ex) 19bit -> 524288 setting(=2^19)
Incremental type: set the pulse per revolution x4 ex) 3000 pulse -> 12000 setting(3000x4=12000)
(Note 1) The parameter must be set when the motor is off.
(Note 2) Make sure that the encoder type setting and encoder pulse number setting are different from L7S.

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 2.6 Encoder signal (ENCODER CONNECTOR) wiring
3) Noise
=> Check the specifications of the encoder cable
=> Replace with an encoder cable that meets the standards
4) Replace the motor. Return to List
5) Replace the drive.

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 Encoder cable open (L7S Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting.
=> Set the parameters as follow
1. If putting ID, motor parameter is automatically set
2. Motor ID is on the motor label.

Encoder Type [P0-01]

Encoder pulse 1 .Applied Encoder pulse per revolution

per revolution [P0-02] 2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution

Incremental type: set the pulse per revolution

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.6 Quadrature Quadrature encoder signal (CN2) wiring 3.7 Serial encoder signal (CN2) wiring
3.8 Multi-turn encoder signal (CN2) wiring
3) Replace the motor.

4) Replace the drive.

Return to List

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 Encoder cable open (L7N Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting. => Set the parameters as follow

1. If putting ID, motor parameter is automatically set

2. Motor ID is on the motor label.

Encoder Type [0x2001]

Encoder pulse 1 .Applied Encoder pulse per revolution

per revolution [0x2001] 2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution

Incremental type: set the pulse per revolution

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.5 Serial encoder signal (CN2) contact 3.6 Multi-turn encoder signal (CN2) wiring

3) Replace the motor.

4) Replace the drive.

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 Encoder cable open(L7NH/L7P Drive)

1) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting.
1. If putting ID, motor parameter is automatically set
2. Motor ID is on the motor label.

1 .Applied Encoder pulse per revolution

2. Encoder pulse per revolution is on the motor label.

Caution Serial type: set the number of bits per revolution ex) 19bit -> 524288 setting(=2^19)
Incremental type: set the pulse per revolution x4 ex) 3000 pulse -> 12000 setting(3000x4=12000)
(Note 1) The parameter must be set when the motor is off.
(Note 2) Make sure that the encoder type setting and encoder pulse number setting are different from L7S.

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 2.6 Encoder signal (ENCODER CONNECTOR) wiring

4) Replace the motor.

5) Replace the drive. Return to List

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 Motor setting (L7S/L7N/L7NH/L7P Drive)

 Check the Motor ID matches the label attached on the motor.

Return to List

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 Z phase open (L7S/L7NH/L7P Drive)

1) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.6 Quadrature Quadrature encoder signal (CN2) wiring 3.7 Serial encoder signal (CN2) wiring
3.8 Multi-turn encoder signal (CN2) wiring

2) Replace the motor.

3) Replace the drive.

Return to List

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 Low battery(L7S/L7N/L7NH/L7P Drive)

1) How to use without battery in multi-turn encoder mounted motors?

=> LS Drive : LS Drive: Set P0-26 to 1 (use multi-turn encoder as a single turn)
=> L7N Drive : Set the 4th bit of 0x200D to 1

=> L7NH/L7P Drive : Set 0x2005 to 1 (use multi-turn encoder as a single turn)
=> After setting, turn on the power again.

2) In the case of using the battery, if the battery voltage is under 3.3V, AL-35 triggers.
=> Please replace the battery. Return to List

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 Sinusoidal ENC amplitude error Sinusoidal ENC frequency error (L7NH/L7P Drive)

1) Check the encoder cable wiring.

2) Replace the drive.

3) Replace the resolver.

4) Replace the motor.

5) Replace the converter.

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 Encoder setting (L7NH/L7P Drive)

1) Check the motor / drive brand label.

2) Check Encoder Specifications and Type.

=> Replace the encoder cable.
=> Replace the motor.

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 Under voltage(L7S/L7N/L7NH/L7P Drive)

1) Check whether the main power connector(L1, L2, L3) contact is poor.

2) Check input power (3 phase AC 170 [V] or more)

3) Check whether power supply voltage momentary power failure occurs.

=> L7NH/L7 Drive : Input small value in parameter [0x2007]
=> L7S Drive : Input small value in parameter [P0-07]
=> L7N Drive : Parameter [0x2004]

4) Check the DC link voltage is above DC 190V during acceleration.

=> Supply the power supply voltage to the regular range or set the acceleration (time / gain) longer

5) Check the DC link voltage is within the range of 260 to 320 [V] in the SV-Off state.
=> Replace the Drive.

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 Over voltage (L7S/L7N/L7NH/L7P Drive)

1) Check the input power voltage.

=> Set the power supply voltage within specification.

2) Check the regenerative resistor wiring.

=> Wrong wiring or poor contact.

3) Selecting the regenerative resistor option specification.

4) Check whether the load inertia moment ratio is within the allowable load.
=> Increase the deceleration time or reduce the load.

5) DC link voltage should be within 385 [V] in SV-Off state.

=> Replace the drive.

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 Main power fail (L7S/L7N/L7NH/L7P Drive)

1) Check whether the main power connector(L1, L2, L3) contact is poor.

2) Check whether the voltage between L1, L2, L3 is AC170 ~ AC253 [V]

3) Measure the voltage of each phase of power supply voltage.

=> Correct unbalance of power supply voltage.

4) Check main power input mode parameter setting

=> Set the main power input mode to match the input power
=> L7NH/L7P Drive : Input small value in parameter [0x2006]
=> L7S Drive : Input small value in parameter [P0-06]
=> L7N Drive : Input small value in parameter [0x2003]

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 Control power fail (L7S/L7N/L7NH/L7P Drive)

1) Check the power wiring of control power C1, C2.

2) are you applying the 220V for control power to the drive for 400V?
=> The control power of the drive for 400V must also be 400V.

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 Over speed limit (L7S/L7N/L7NH/L7P Drive)

1) Check weather the power cable UVW is correct

=> It may occur in the case of UVW miss-wiring.

2) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting => L7S (Refer to 15 page )

3) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting => L7N (Refer to 16 page)

4) Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting => L7NH/L7P (Refer to 17 page )

Return to List

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 POS following(L7S/L7N/L7NH/L7P Drive)

1) Does it occur during high-speed operation?

=> Expansion of error pulse range at high-speed operation for serial type motor (2 million pulse setting)
=> Pulse range setting parameter L7S : P4-11, L7N/L7NH/L7P : 0x6065

2) Check weather the speed is too high.

=> Operate the motor at rated speed
=> Position following error may occurs if both of inertia and speed are high.

3) Check the structure that inertia is too high.

=> Select the motor capacity again.

4) Check weather it has mechanical restraint

=> Please check the Mechanism structure.

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 Excessive SPD deviation (L7NH/L7P Drive)

1) Please check the U/V/W wiring for motor power cable.

2) Check the basic parameter.

=> Check Motor ID (0x2000), Encoder type (0x2001), Encoder resolution (0x2002)

3) Check for collisions or mechanically constrained state during machine operation.

4) Check the setting value for Excessive SPD deviation detection level[0x2310].

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 Pulse command frequency error (L7S Drive)
1) Check the accordance of Pulse input logic[P4-00] between drive and upper controller.

2) Check pulse input wiring in CN1(control signal connector) for ground or short circuit.

3) Use the Twisted Pair Shield cable for pulse command signal(PF+, PF-, PR+, PR-)

4) Replace the upper controller

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 Excessive speed error (L7S Drive)

1) Please check the U/V/W wiring for motor power cable.

2) Check the basic parameter.

=> Check Motor ID (P0-00), Encoder type (P0-01), Encoder resolution (P0-02)

3) Check for collisions or mechanically constrained state during machine operation.

Return to List

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 Motor Over Run (L7S Drive)

1) Please check the U/V/W wiring for motor power cable

2) Check encoder cable for ground or short circuit.

=> Repair or replace encoder cable
=> Refer the manual: 3.5 Serial encoder signal (CN2) contact 3.6 Multi-turn encoder signal (CN2) wiring
3) Check the basic parameter
=> L7S Drive : Please find the motor ID(P0-00), encoder type(P0-01), encoder resolution(P0-02) on the motor label and check
the parameter setting(L7S) - Refer page 2 for the related setting
=> L7N, L7NH, L7P Drive : Please find the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor
label and check the parameter setting (L7N, L7NH, L7P Drive) - Refer page 15, 16 for the related
setting

4) Check the gain parameter

=> If gain value set too high, it may cause motor over run

5) Replace the drive

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 Parameter Range Error (L7S/L7NH/L7P Drive)
 After O/S upgrade, It occurs when the address values of the old O/S do not match with the new O/S’s
Please reset the parameters
=> L7S Drive : Parameter initialization (Cn-09)
=> L7NH/ L7P Drive : Parameter initialization by Drive CM

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 EtherCAT Communication error (L7N Drive)

1) Check the CN3, CN4 Connectors and EtherCAT communication cable

=> Check whether the EtherCAT cable is STP cable, higher than CAT 5.0, signal cables is properly paired
Or replace the EtherCAT cable and test

2) Replace the drive

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 Factory setting (L7S/L7N/L7NH/L7P Drive)

 Replace the drive

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 Output contact setting error (L7S/L7N Drive)

 Output contact duplication setting is not allowed

=> L7S Drive : Parameter initialization (Cn-09)
=> L7NH/ L7P Drive : Parameter initialization by Drive CM

Return to List

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 Main power phase loss (L7S/L7N/L7NH/L7P Drive)

 Main power phase loss is displayed as Alarm or Warning message according to Main power input setting
=> L7S Drive : [P0-06] DIGIT2 set 1 and main power isn’t applied when Servo-on
=> L7NH/ L7P Drive : [0x2006] BIT4 is set and main power phase open when Servo-on
=> L7N Drive : Main power phase loss occurs when parameter[0x2003] setting ‘1’ and Servo-on status.

1) Check whether the main power connector(L1, L2, L3) contact is poor

2) Check whether the voltage between L1, L2, L3 is AC170 ~ AC253 [V]

3) Measure the voltage of each phase of power supply voltage.

=> Correct unbalance of power supply voltage.

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 Battery Low (L7S/L7N/L7NH/L7P Drive)

 Output voltage of encoder Back Up battery is low when using absolute encoder (3.3V or more)

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 Software Position Limit (L7NH/L7P Drive)

 Software position limit function setting[0x2400] value[(1(CCW Limit) or 2(CW Limit) or 3(CW/CCW Limit) is higher than
Software position limit minimum value.

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 Excessive torque command (L7S/L7N Drive)

 Command torque value is more than maximum torque setting.

=> Set the proper analog command torque scale.

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 Overspeed command (L7S/L7N Drive)

 Command speed value is more than maximum speed setting.

=> Set the proper analog command speed scale.

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 Excessive DB current (L7P/L7NH Drive)

1) Motor driven by external force

=> Don’t drive the motor by external force.

2) DB capacity exceeded
=> Lower the command speed.
=> Lower the load inertia moment.
=> Reduce the frequency of DB stop operation.
3) Replace the drive.

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 Overload Warning (L7S/L7N/L7NH/L7P Drive)

 It Occurs when the value of the cumulative operation overload rate reaches the value of the overload warning level setting.
=> L7S Drive : It reaches to parameter[P0-13]
=> L7NH/ L7P Drive : It reaches to parameter [0x2010]
=> L7N Drive : It reaches to parameter [0x200A]

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 Driver/Motor combination fail (L7S/L7N/L7NH/L7P Drive)

1) Is Motor ID matched to the motor label?

2) This warning is caused by using a drive that does not match the motor model.
=> Refer the product catalog and manual to choose the right model.

3) It occurs when the same function is duplicated over two or more I / O PINs.(Only for L7NH, L7P)

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 Low voltage (L7S/L7N/L7NH/L7P Drive)

 Depending on the setting of the main power input mode, it is displayed as main power phase loss alarm or warning.
=> L7S Drive : [P0-06] DIGIT2 setting is 1 and DC-Link voltage is below 190V.
=> L7NH/ L7P Drive : [0x2006] BIT4 setting is 4 and DC-Link voltage is below 190V.
=> L7N Drive : [0x2003] Main power phase loss processing method setting value is 1 and DC-Link voltage is below 190V.

1) Check whether the main power connector(L1, L2, L3) contact is poor.

2) Check the input power (3 phase AC above 170 [V])

3) Check whether power supply voltage momentary power failure occurs

=> L7NH/L7 Drive : Input small value in parameter [0x2007]
=> L7S Drive : Input small value in parameter [P0-07]
=> L7N Drive : Parameter [0x2004]

4) Check DC-Link voltage is above 190V during accelerating.

=> Supply the power supply voltage in the regular range or set the acceleration (time / gain) longer.

5) Check the DC link voltage is within the range of 260 to 320 [V] in the SV-Off state
=> Replace the Drive.

6) Measure the voltage of each phase of power supply voltage.

=> Correct unbalance of power supply voltage.

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 Emergency signal input (L7S/L7N/L7NH/L7P Drive)

 EMG contact signal

=> L7S Drive : Check EMG contact . Wiring to pin No.18 on CN1 or change the setting of P2-09 to 10001 => 11001.
In the case of L7S Drive, the EMG input signal logic defaults value is contact B, and for L7N, L7NH,
and L7P Drive, the default is value is contact A(Refer to picture on 52 page)
=> L7NH/ L7P Drive : Check EMG contact . Is the EMG signal turned on?
Default value is contact A. If you need to change the contact A to B, change the contact High to Low as below picture
through the Drive CM.

=> L7N Drive : Check EMG contact . Is the EMG signal turned on?
Default value is contact A. It’s available to change the contact A to B.

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 (L7S/L7N/L7NH/L7P Drive)

 It occurs when co-occurrence of W-20 and W-80.

 The measures for W-20 and W-80 should be done at the same time.

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 (L7N/L7NH Drive)

 STO connection error

=> Check the STO connection.
=> Connect STO cable or STO Dummy connector when not used
(The STO dummy connector is included in the drive box)

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 (L7S Drive)

CCW or CW Limit signal is on. Check the CCW or CW Limit I/O setting and contact.
=>L7S Drive : Check the limit contact., Is CCW Limit or CW Limit on?
Wiring No.19 and 20 of CN1, or change the B contact (default value) to A contact

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 (L7N Drive)

 CCW Limit signal is turned on. Check the CCW or CW Limit I/O setting and contact.
=>L7N Drive : : Check the limit contact., Is CCW Limit or CW Limit on?
Default value is contact A. It’s possible to change the contact A to B(Refer to L7N Manual)

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 (L7NH/L7P Drive)

 CCW Limit signal is turned on. Check the CCW or CW Limit I/O setting and contact.
=>L7NH Drive : : Check the limit contact., Is CCW Limit or CW Limit on?
Default value is contact A. If you need to change the contact A to B, change the contact High to Low as below picture
through the Drive CM.

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bt 2.0 (L7S/L7N/L7NH/L7P Drive)

1) Reinstall the O/S

2) Replace the drive

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Upper controller output pulse, but motor doesn’t run (L7S Drive)

1) Is the operation mode (P0-03) set to position operation (2)?

2) Is P4-00 (input pulse logic) matched to the input pulse signal?

 Set according to input pulse signal of upper controller

3) Does servo drive window display ‘P.-.run’?

4) Check signal contact of EMG, CCW/CW Limit and so on.

=> Wiring pin No.18, 19 on CN1 or change contact B(default) to A.

5) Check the wiring according to pulse input signal

=> Line drive or Open collector

6) Does the value of parameter St-03 (tracking position pulse) increase?

=> If the serial motor (19bit) is used and the pulse is output too slowly, the actual motor may be driven but may appear
to be too slow and stopped.

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Upper controller output pulse, but motor doesn’t run (L7P Drive)

1) Is 0x3000 (control mode) set to pulse type position control mode (1)?

2) Is 0x3003 (input pulse logic) matched to the input pulse signal?

=>Set according to input pulse signal of upper controller

3) Is the drive display window in the P.-.run state?

4) Check signal contact of EMG, CCW/CW Limit and so on.

=> The defualt contact value is A.

5) Check the wiring according to pulse input signal

=> Line drive or Open collector

6) Does Position actual value(actual position pulse) increase?

=> If the serial motor (19bit) is used and the pulse is output too slowly, the actual motor may be driven but may appear
to be too slow and stopped.

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Servo-on isn’t enable(L7S/L7N/L7NH/L7P Drive)

1) Is main power connected?

=> Check if power is supplied to L1, L2, and L3.
=> If main power is not connected, there are differences below.
P-bb (Main power unconnected)
P-.bb (Main power connected)

2) Is the parameter set to three-phase use while using the single-phase main power?
=> L7S: 3 phase power input is used when P0-06 is set to '01'
=> L7N: When BIT 0 of 0x2003 is set to '1', 3-phase power input is used
=> L7NH: When BIT 1 of 0x2006 is set to '1', 3-phase power input is used

3) Is there an alarm?
=> Check drive segment window for alarm occurrence
=> Reset the alarm

4) L7S Drive: Check On / off status of servo-on by monitoring through Live I.C.E
L7P Drive: Check On / Off status of servo-on by monitoring through Drive CM

5) Is the DC reactor connector (PO, PI) short pin of drive missing?

=> Link DC reactor connector (PO, PI) Short pin

6) Replace the Drive

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How to change the operating direction (L7S/L7N/L7NH/L7P Drive)

1) L7S Drive :

2) L7N Drive : Set 1st bit of 0x200D to ‘1’

3) L7NH/L7P Drive : Set 0x2004 parameter to ‘1’

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Motor Hunting (L7S/L7N/L7NH/L7P Drive)

1) Please check the U/V/W wiring for motor power cable .

=> Alarm may appear in case of U/V/W miss-wiring

2) Check encoder cable for ground or short circuit

=> Repair or replace encoder cable
=> Refer the manual: 3.5 Serial encoder signal(CN2) 3.6 Multi-turn encoder signal(CN2)

3) Check the gain parameter

=> If gain value set too high, it may cause motor over run.

4) Check the basic parameter.

=> Please check the motor ID(P0-00), encoder type(P0-01), encoder resolution(P0-02) on the motor label and check the
parameter setting(L7S)
=> Please check the motor ID(0x2000), encoder type(0x2001), encoder resolution(0x2002) on the motor label and check the
parameter setting (L7N, L7NH, L7P Drive)

5) Replace the motor.

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Homing speed doesn’t increase (L7N/L7NH/L7P Drive)

 Set the homing speed as follows.

1) In the case of encoder revolution is 19bit, Serial encoder (When the electronic gear ratio is 1:1)
- Homing speed [0x6099]
0x6099: 01 Switch seek speed, setting 5242880 (600rpm)
0x6099: 02 Zero search speed, speed setting for searching for index signal, moving 600rpm when set to 5242880
- Homing acceleration [0x609A]
Acceleration/deceleration homing speed setting.
When set to 5242880, the acceleration (deceleration) time is 0.1 second

2) In the case of encoder revolution is 3000pulse, Incremental encoder (When the electronic gear ratio is 1:1)
- Homing speed [0x6099]
0x6099: 01 Switch seek speed, setting 120000 (600rpm)
0x6099: 02 Zero search speed, speed setting for searching for index signal, moving 60rpm when set to 12000
- Homing acceleration [0x609A]
Acceleration/deceleration homing speed setting.
When set to 5242880, the acceleration (deceleration) time is 0.1 second

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How to use encoder output in open collector mode(L7S/L7P Drive)

 Please refer the L7S or L7P manual to use encoder output in open collector mode.
=> http://www.lsmecapion.com/eng/contents/sub02/sub03_03.php

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Speed doesn’t go up even if I increased speed (L7S/L7P Drive)

1) Is it motor with 19bit serial type encoder?

=> If yes and position operating mode, Servo drive receives below 1Mhz from upper controller.
Otherwise, drive lose pulse and motor runs too slowly. So, upper controller must be setting below 1Mhz.
Also, It’s possible to adjust the motor speed by setting electric gear ratio of the servo drive.

2) Monitor the input pulse(st-03 : L7S Drive)

=> In case of serial encoder type motor which has high pulse per revolution, motor might run badly slow by insufficient
command pulse.

3) Check the maximum speed of motor

=> if the max speed is 2000rpm, even though command speed is over 2000rpm, motor runs in 2000 rpm only.

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How to set the electric gear ratio (L7S/L7N/L7NH/L7P Drive)

Please refer the manual to set the electric gear ratio

http://www.lsmecapion.com/eng/contents/sub02/sub03_03.php

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Only Servo-On without command, but the motor is spinning (L7S Drive)

 Is operation mode speed operation?

=> In the case of speed operation, the motor slowly moves due to external noise voltage.
=> To eliminate the noise voltage, set the parameter P2-19 (clamp voltage) to 100mV~200mV so that the servo is
not driven by too little voltage.

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Internal JOG operation of Servo Drive does not work (L7S Drive)

 Are EMG, CCW Limit, CW Limit activated?

=> Wiring Pin no. 18, 19, 20 on CN1 or change the B contact (default value) to A contact

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How to set the speed scale for the analog speed operation(L7S, L7P Drive)

 Refer the L7S/L7P Drive manual

1) L7S manual V2.4 : 4.4.3 Analog Input/Output ParameterSetting

2) L7P manual V1.2 : 6. Velocity control section

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How to set the torque scale for the torque operation (L7S, L7P Drive)

 Refer the L7P Drive manual

1) L7S manual V2.4 : Analog Input/Output Parameter Setting

2) L7P manual V1.2 : 7. Torque control section

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How to use analog speed operation (L7P Drive)

 Refer L7P Drive manual

=> 6.2 Analog Velocity Command

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Jog operation does not work in Drive CM (L7NH Drive)

 L7NH Drive : Is it OP status? In other words, is it well-communicated with upper controller?

=> Drive Jog operation is possible in Pre-OP state, so communication connection with upper controller must be
disconnected.

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Origin position error during origin operation (L7NH/L7P Drive)

1) Is the dog sensor intermittently turned on due to noise?

=> Check weather dog sensor is on or not through the Drive CM

2) In the case of using Z-phase of motor for Homing, if the position of Z phase is almost match with home sensor position,
Shift the position of home sensor and try again.

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Nothing displayed in the segment window (L7S/L7N/L7NH/L7P Drive)

1) Check control input power for C1, C2

2) Replace the drive

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Analog monitor’s output is abnormal (L7NH/L7P Drive)

 Is it connected to the analog monitor output connector as shown below?

Connector Specifications (DF-11-4DS-2C (HIROSE))

To use analog monitor function, connect to CN7(analog monitor output connector) not 1, 2, 3, 4 of CN1 I/O

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What is User Unit? (L7NH/L7P Drive)

 Please set the minimum unit (User Unit) for each user.
Assume that a motor with a 19-bit (524288 pulses) encoder drives a ball screw that moves 10um in one revolution.

In this case, set the parameter as below

Motor Revolution [0x6091.1] : 524288

Shaft Revolution [0x6091.2] : 10000

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How to calculate speed and acceleration, deceleration(L7NH/L7P Drive)

1) Case of Gear ratio is 1 : 1

Encoder Resolution : 60[rpm] = speed [uu/s] : speed[rpm]
When the user needs to drive with 19 bit motor at 3000 [rpm] speed 524288[ppr] : 60[rpm] = speed [uu / s]: 3000 [rpm]
speed[uu/s] = 26214400[uu/s]

2) Case of Gear ratio is not 1 : 1

Speed[UU/sec] = speed[rpm] X (encoder resolution/Motor revolution) X (Shaft Revolution/60[rpm])
Ex) 19bit Motor Revolution : Speed[UU/sec] = 3000[rpm] X (524288/524288) X (20/60[rpm])

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Index mode operation does not work even if I gave start signal(L7P Drive)

1) Is segment window displaying Servo On (P.-run)?

=> Confirm that the display is P.-bb (Servo Off), W-80 (Emergency stop), Pot (CCW Limit) and Not (CW Limit) and
set to P.-run Please

2) Check the control mode(0x3000) is indexing position mode

3) Check whether the Start signal is input or not by the digital input in Drive CM
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4) When the start signal is input, please confirm Stop signal is not on by Drive CM

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How to select communication program (Drive CM, Live I.C.E)

1) L7S, L7N Drive : Live I.C.E (Communication program)

Parameter setting and drive monitoring.

2) L7NH, L7P, Pegasus Drive : Drive CM (Communication program)

Parameter setting and drive monitoring.

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How to check the resolution of motor(encoder) (L7S/L7N/L7NH/L7P Drive)

1) In the case of the below serial encoder, the resolution is 16 bits for the multi-turn and the resolution for
single-turn is 19 bits (524288 pulse)

2) In the case of the below incremental encoder 3000 p/r means 3000 pulses per revolution, our servo drive is
quadrupled and recognized as 12000 pulses.
(In the case of L7S Drive, set to 3000 without multiplication when setting the encoder resolution. L7P/L7NH Drive
multiplies by 4 and sets it to 12000)

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Parameter is unchanged (L7S/L7N/L7NH/L7P Drive)

1) Is it Servo-on status?

2) Did you turn the power on again after parameter setting?

3) If Drive CM is used, have you pressed Enter key after parameter change? Press the Enter key to save it.

 Please check the parameter change attribute

for example, some parameters

Depends on the parameters, parameters change attribute is different

- Parameter change is possible during servo-on status.
- Parameter change is possible during servo-off status only.
- Parameter change is only possible during servo-off status and must be power off and on again.

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What is brake type motor? (L7S/L7N/L7NH/L7P Drive)

1. Brake Type Motor : it is used for the purpose of preventing the vertical axis fall down
(Servo Off or Power Off),
=> Not for the stopping during operation. But for fixing to prevent fall down

2. Wiring :
*Indirect control is required by using the relay through the brake output of CN1 I/O terminal.
The drive can not output high voltage and current to control the motor brake directly
*It is necessary to use SMPS for brake power only (Do not use SMPS for interface)

3. Output contact : Output contact: Brake output contact is on when Servo is enable (Servo On)
and Brake output contact is off off when Servo is disable (Servo Off)
When +24V or +90V(depending on motor specifications) is applied to the motor's
brake side Brake turns off and brake turns on when power is not applied.

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How to wire the brake type motor (L7S Drive)

Brake Encoder

CN1 I/O Motor

Con Con

Brake+ Con
DC 24V GND output
Relay Brake-

CN1 Pin.No
50 wiring

+24V GND 24
+24V GND 24

SMPS
SMPS

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How to wire the brake type motor (L7N Drive)

Brake Encoder
Con Con
CN1 I/O Brake+
Motor
Con
DC
DC24V
24VGND
GNDoutput
출력
Relay Brake-

CN1 Pin.No
50 번 wiring

+24V GND 24
+24V GND 24

SMPS
SMPS

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How to wire the brake type motor (L7P Drive)

Brake Encoder
Con Con
Motor
CN1 I/O Brake+ Con

DC 24V GND output

Relay Brake-

CN1 Pin.No
50 wiring

+24V GND 24
+24V GND 24

SMPS
SMPS
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How to wire the brake type motor (L7NH Drive)

Brake Encoder
Con Con
CN1 I/O Brake+
Motor
Con

DC 24V GND output

Relay Brake-

CN1 Pin.No
50 wiring

+24V GND 24
+24V GND 24

SMPS
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Auto tuning dose not work (L7HN/L7N Drive)

 Is the upper controller communicating with the drive?

=> Auto tuning is available only in Pre-OP state. That is do say, you must disconnect from the upper controller

 Auto tuning isn’t available when segment window displays as below

<Safe OP status> <OP status>

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Can I input the digital input signal at + 24V instead of GND 24V? (L7S/L7N/L7HN/L7N Drive)

 Since the L7 Series uses a bidirectional photocoupler, the digital input signal can be used as + 24V.
In this case, the COM terminal should be input to GND 24V.

Digital Input Digital Output

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Is torque operation possible with 422 communication? (L7S/L7P Drive)

 Torque operation is not possible with 422 communication.

Torque operation is possible only by analog input voltage.

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Is it possible to operate the position by 422 communication (L7S/L7P Drive)

 L7S Drive : Position operation must control the position by receiving external pulse.
Position operation is not possible with 422 communication.

 L7P Drive : There are two ways to operate the L7P drive
- Pulse operation mode: Position operation is not possible with 422 communication.
- Indexing operation mode: Position operation performs by drive internal parameter setting value.
Mainly used by single axis. In this case, position operation control is possible by 422 communication.

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Where is the analog input / output terminal? (L7S/L7P/L7NH Drive)

 L7S Drive : CN1 terminal includes the analog input / output terminal as same as the digital input / output.
 L7P/L7NH Drive : The analog input terminal is included in the CN1 terminal, and the analog output terminal is placed as
below picture

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Can I generate an overload alarm earlier? (L7S/L7N/L7NH/L7P Drive)

 This indicates the load factor at which operation overload starts to be accumulated. When this is set to a value no more than 100,
operation overload will start to be accumulated earlier at the set load factor to resulting early trigger of operation overload alarm
(AL-21). If the heat radiation condition of the drive is poor, configure the setting to no more than 100% to trigger an overload alarm
earlier.

L7S Drive Parameter : P0-12

L7N Drive Parameter : 0x2009
L7NH Drive Parameter : 0x200F
L7P Drive Parameter : 0x200F

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Not possible to input a value for parameter 0x6099 (L7N/L7NH/L7P Drive)

 The parameter of 0x6099 consists of 2 Sub indexes.

In other words, this value must be entered in 0x1 (Speed during search for swtich) and 0x2 (Speed during search for zero).

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-Err- message occurred when setting parameters.(L7S Drive)

 When setting the parameter by drive loader,

if the parameters that should be set in servo off state set in the servo On state, this massage’-Err-’ occurs

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Can I adjust the speed during torque operation?(L7S/L7N/L7NH/L7P Drive)

 The speed can be limited during torque operation. In other words, it is not driven beyond the limited speed.

 L7S Drive : Limit the speed by speed limit mode(P1-22)

* 0: limit the speed by parameter[P1-23], 1: motor maximum speed, 2: analog speed command, 3: limit the speed by
minimum value between [P1-23] and analog speed command.
* Speed Limit[P1-22] : In the torque control mode, Setting for the speed limit when speed limit mode[P1-22] is ‘0’

 L7N Drive : Limit the speed by speed limit mode(0x2112)

* 0: Limit the speed by parameter[0x2113], 1: Limit the speed by maximum motor speed

 L7NH/L7P Drive : Limit the speed by speed limit mode(0x230D)

* 0: Limit the speed by parameter[0x230E], 1: Limit the speed by maximum motor speed

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How to set the encoder output pulse? (L7S/L7P Drive)

▶ L7S Drive : Pulse out per rotate setting [P0-14]

- It’s to set the output pulse per motor’s rotation
- User has to multiply pulse by 4.
Ex) To output 1000 pulse per rotate, pulse out per rotate has to be 4000 which is multiplied 4 times.
- Encoder output wiring diagram
=>Live Drive (Cn1) :

=> Open Collector :

Please refer below web-site.
http://www.lsmecapion.com/eng/contents/sub02/sub03_03.php?writemode=view&code=library&seq=9004&page=1
▶ L7P Drive : Encoder output pulse setting [0x3006]
- It’s to set the output pulse per motor’s rotation
- User has to multiply pulse by 4.
To output 1000 pulse per rotate, pulse out per rotate has to be 4000 which is multiplied 4 times.
- Encoder output wiring
: diagram
Please find 10.13 [Encoder signal output] section in the manual
=> Please refer below web-site.
http://www.lsmecapion.com/eng/contents/sub02/sub03_03.php?writemode=view&code=library&seq=8992&page=1
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Sequence of connector pin number (L7S/L7N/L7NH/L7P Drive)

L7S/L7P Series
CN1 Connector

L7N/L7NH Series
Spec
CN1 Connector
Spec
Spec
Spec

L7 Series Encoder
Connector
Spec
Spec Return to List

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How to use external regenerative resistor (L7S/L7N Drive)

 L7S :

 L7N : Wiring is the same as L7S Drive. But parameters are different as below Return to List
0x2007 (The value of regenerative resistor), 0x2008 (The capacitor of regenerative resistor)

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How to use external regenerative resistor (L7NH/L7P Drive)

 Please link to below web-site and find the 10.11.2[Using External Regeneration brake resistor] in L7P manual

http://www.lsmecapion.com/eng/contents/sub02/sub03_03.php?writemode=view&code=library&seq=8992&page=1

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How to set parameters with the drive operation buttons (L7S Drive)

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How does the drive control button display numbers more than 6 digits? (L7S Drive)

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How to use the analog speed override function during index operation?(L7P Drive)

 During Indexing Position operation, It’s possible to override index speed according to analog input.
 This function is applied when the analog speed override mode (0x221E) is set to use
 You can adjust the offset of the input voltage by setting the analog speed override offset (0x221F).
 Override speed is applied by analog input. Ex) -10[V] = 0[%], 0[V] = 100[%], 10[V] = 200[%]

Parameter I/O Signal Configuration[0x300A]

1) Third BIT : 0 -> Applied for Speed override each index section
: 1 -> Speed override is applied in real time regardless of index section
2) When bit is changed during operation, it is applied immediately
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How to wire RS-422/485 (L7 Series)

RS-422 Wiring : Use 5Pin connector for communication with external device.
Please refer name and wiring direction for each pin.
Signal direction
Pin No. CNET Name External Device Name
CNET External Device

RS-485 Wiring : Use 5Pin connector for communication with external device.
Please refer name and wiring direction for each pin.
Signal direction
Pin No. CNET Name External Device Name
CNET External Device

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