Manufactured By:

SAMYAK INSTRUMENTATION PVT.LTD

F-4, Memnagar Complex,
Opp. Petrol Pump, Memnagar, Ahmedabad-380 052.
Phone: +91-79-27495500/5600 FAX: +91-79-27417997
E-mail: support@samyak.com
INDICATOR CONTROLLER MODEL: 301P SAMYAK

1. INTRODUCTION
This is a microcontroller based universal Process Indicator controller/Pulse
counter unit. It is highly versatile, accurate and different from the conven-
tional indicators.

The set Parameters and integrated total are stored in serial NVRAM. No bat-
tery back up is required.

General Specifications of this unit are:

• This is a Microcontroller based unit.

• Power Supply: 230VAC/115VAC is field selectable from back panel.

• Output Options:
Transmitter Power Supply: +24V DC +/- 5%, 50mA
Relay Transmitter Power Supply: +24V DC +/- 5%, 50mA
Retransmitted 4 to 20mA / 50mA
Modbus serial (RS 232/485)

• Indication: Counter: Four Digit Seven Segment Red LED.

• Key board: Four keys membrane like.

• Accuracy: 0.2% + +/- 1 digit.

• Warm up time: 15 minutes.

• Configuration Data & Integrated total are stored in serial NVRAM.

• Mechanical data:

Mounting: Panel mounting

Cutout size: 92mm x 92 mm
Outer dimension: 96mm x 96mm x 90mm (Depth)

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

2. SYSTEM DESCRIPTION
The unit is based on an 8-bit Micro-controller. It counts and displays no. of
pulse received.
With the help of the keypad and display, unit allows to set and modify various
configuration parameters and calibration.

HARDWARE DESCRIPTION:
The unit consists of a CPU and KB/Display card.

The CPU card has necessary hardware for:

Driving Four digit multiplexed Display

Four key keypad interface.
Watch dog circuit
DC regulated supply: +5V, +24V,
The transformer is fitted on this PCB on two mounting screws thro' a
clamp.

• The connectors are accessible from back panel cutout.

• Mating female connectors are supplied along with the instrument.

• The card is soldered with KB/Display card and it slides in frame of the en-
closure. No mounting screws are required. The KB/Display card is fixed
with front bezel.

• Mains selection for 110V/220V is to be done from back panel. There are
total three terminals for mains connection. One of them is for Earthing.
Necessary connection for configuration of 230V/115V mains is indicated
on the sticker on the back panel.

ENCLOSURE:

This is general purpose Powder coated metallic enclosure suitable for panel
mounting. Panel mounting is to be done using side brackets.

KB/DISPLAY CARD AND FRONT PANEL:

A display/KB card has a Four-digit display for Process indication

Four keys are also mounted on this card. The card is soldered with CPU
card. The card is fitted with the bezel. An overlay is provided on the front
side.

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

INSTALLATION GUIDE:

• Unpack the instrument from the packing box carefully.

• Mount the instrument in the panel cut-out of 92mm * 92mm.
• Fix the instrument with the panel using two side brackets.
• All the electrical connections to be done at the back panel on screw type
terminals
• Refer the Appendix for back panel layout.
• Make sure that no wire is connected loosely to avoid generation of spark
and RFI. Before connecting the mains, check the mains configuration on
the back panel.
• Earth the instrument properly.

Applying Input:

• The instrument takes input form back panel

• Transmitter supply is available in printed in back plate

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

3. OPERATING DETAILS
The following paragraphs give detailed description of how to operate the unit.
Before using the instrument, make sure to study and understand this section.

DISPLAY & KEYBOARD:

It displays Process variable/counter.

Unit has 4 key membrane keypad organized as 4 x 1 matrix.

List of keys and their functions:

Keys Function
Index Enter into data entry/verification mode
Select parameter
Enter Save new data and Terminate Edit
mode also can be used as Stop key.
Digit Select (→) Select next digit and it is also used as
Start key.
Increment (↑) Increment selected digit value and al-
so used as Reset key

Normal Mode of Operation:

Whenever a main is switched on to the unit, It counts and displays no. of

pulse received and set scale factor (SF discussed below).

Display count = No of pulse received / Scale Factor

EDIT MODE:

In this mode user can verify or modify various parameters. Entry into Edit
mode is protected by Password.

• Press ‘Index’ key to enter into edit mode. The display window will show
‘PASS’ for a moment and then it will start displaying ‘0000’ with flashing
Left most digit .The unit is prompting for Password. Password is a four di-
git no. There are two different passwords.

Operator's Password: 0101/ 1234

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

• Enter any one of the above password using data entry keys. When ‘Enter’
key is pressed, the validity of Password is checked. If wrong password is
entered the unit comes out of edit mode and displays engineering value.

• Press ‘Index’ key again if you want to enter into edit mode.

• If correct password is entered, then also the unit starts Indicating Engi-
neering value of input. Now press ‘Index’ key, the display will show name
of the parameter to be modified and its value after a moment.

• Pressing the ‘Index’ key again will display next parameter. The various
parameters that will appear on the display with successive depression of
the ‘Index’ key are:

Parameter descrip- Display Values

tion
Password PASS 1234 / 0101
Calibration Zero CALZ
Calibration Span CALS
Out Zero OUTZ 0 to 9999
Out Span OUTS 0 to 9999
Zero Zero 0 to 9999
Full Scale FS 0 to 9999
Decimal Point DP 0, 0.1,0.01
Unit No U-NO 1 to 31
RELAY 1 rl 1 0 to 9999
RELAY 2 rl 2 0 to 9999
RELAY SELECTION ALRL HI-HI, LO-HI, LO-LO
HYSTERISIS HYST 0 to 9999
BUDRATE baud 9600, 19200, 4800

• Following the above process, one can select any of the above listed pa-
rameters.

• When a parameter is selected, its name will be first displayed for a mo-
ment and then current value is displayed in the same field of display. The
left most digits will start flashing.

• Use Increment (Up arrow) key, if you want to modify the flashing digit.

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

• Press increment key, flashing digit will increment up to 9 and rolls back to
0 when it reaches at 9. In case of the left most digit it scrolls between 0, 1,
2 and 3.

• Once desired digit is set, press digit select key (Right arrow) to select
next digit. The next selected digit will flash. Set it to desired value as per
the above step.

• Once all the four digits are set, press ‘Enter’ key. The parameter value will
be modified as per new set value. Display will start indicating Input.
• When in data entry/EDIT mode, if no key is pressed for 25 Seconds, the
unit will terminate data entry mode automatically and start indicating
Process value.

• Press ‘Index’ key to go to next parameter. If ‘Index’ key is not pressed for
more then 25 seconds, the unit will terminate ‘Edit’ mode automatically
and start indicating Process value. To enter into ‘Edit’ mode, one has to
enter Password again.

INDICATION:

The indication of the unit under normal operating mode will be the counted
pulses since last reset given to the unit.

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

4. Calibration Procedure
The Instrument is duly calibrated at the factory. For any reason, if re-calibra-
tion is required follow the procedure as defined below.

As explained earlier, One can do calibration through the keyboard itself, no

trimming of potentiometer is required. The Zero and Full-scale values are
stored in NVRAM. The calibration is allowed only in Engineer's Password
mode.

1. Switch on the instrument and allow 15 minutes of warm up time before

starting calibration.

2. Take a standard source. Set its output at desired Zero (CALZ) value. Ap-
ply output of the source to the input terminals (10 & 11) of the indicator.

3. Go to EDIT mode:

• Enter engineers Password '1234'.

• Press INDEX key after entering this Password.
• The parameter 'CALZ ' for Zero will be displayed.
• Actual row counts will be displayed.
• Allow the reading to settle, press 'Enter' Key.
• This count will be stored as Zero/Offset reading.

4. Now apply input equal to Full scale/Span (CALS):

• Press 'Index' key again.

• 'CALS' for Span calibration will be displayed.
• Row counts of VFC will be displayed.
• Allow the reading to settle and Press ' Enter' key.
• This reading will be stored as Span/Full scale.

Now the instrument is calibrated.

For again entering into calibration mode, you have to wait till the instruments
go to normal mode. After that go to EDIT mode thro' Engineers' Password
and perform calibration.

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

RELAYS FUNCTION: (Optional)

Instrument has two relays. These relays are configured to operate as

selected HI-HIHI, LO-LOLO, LO-HI alarm relay.

RELAY OPERATION :( for lwo-high)

Two relays are provided. I.e. Relay 1(LOW) & Relay 2(HIGH). Relay will operate
on basis of Flow value. Example if relay1 values is 30 and relay 2 values is 50.
Then relay1 will remain ON till Flow value is will equal to less then relay1 value
(30). Relay 2 will ON when Flow value will equal to more than relay2 value (50).

RELAY OPERATION :( for hi-hihi)

Two relays are provided. I.e. Relay 1(HI) & Relay 2(HIHI). Relay will operate on
basis of Flow value. Example if relay1 values is 30 and relay 2 values is 50. Then
relay1 will remain ON till Flow value is will equal to more then relay1 value (30).
Relay 2 will ON when Flow value will equal to more than relay2 value (50).

Hysteresis: It’s the offset value to switch off the alarm value
For E.g. If the high alarm is set 50 then relay will be set ON at 50 and will be set
OFF at (50 – hysteresis value).

Retransmission Output: (Optional)

4-20 mA current output is available from the instrument. This output is pro-
portional to process variable (4.00 mA for Zero display) and 20.0 mA for Full
scale display. Output calibration can be done through software by using key-
pad and standard DMM.

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

5. MODEL: SMIT-301P MODBUS PROTOCOL

Register NO Parameter Function

40001 Zero Read/Write the Zero Value
40002 Full-scale Read/Write the Full scale Value
40003 Decimal point Read/Write the DP Value
40004 UINT NUMBER Read/Write the unite no
40005 RELAY 1 Read/Write the Low alarm value
40006 RELAY 2 Read/Write the Hi alarm value
40007 ALRL Read/Write the alarm value
40008 HYSTERISIS Read/Write the hyst value
40009 BAUDRATE Read/Write the baudrate value
40010 Process variable Read Flow value

NOTE: PERAMETER FUNCTION

BAUDRATE 0 – 4800
1 - 9600
2 - 19200
ALRL 0 - LO-HI
1 - LO-LO
2 - HI-HI

FRONT LAYOUT:

SAMYAK SMIT-301P

PROCESS VARIABLE

INDEX

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INDICATOR CONTROLLER MODEL: 301P SAMYAK

6. BACK PANEL DETAILS

PIN DETAILS
NO.
1 LINE MAINS
2 NEUTRAL 90-255
3 EARTH VAC
9 ------
10 I/P +VE ANALOG
11 I/P –VE INPUT
12 +24V/50MA TPS
15 RX O/P +VE ANALOG
16 RX O/P -VE OUTPUT
17 D- RS-485
18 D+ MODBUS SERIAL
19 NC ALARM
20 C RELAY 1
21 NO
22 NC ALARM
23 C RELAY 2
24 NO

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