GMPC controller made by LSIS Co., Ltd. in Korea. GMPC controller can support Modbus protocol.
<Figure 1> is read setting example of MODBUS2 communication driver for GMPC model.
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| <Figure 1> Read setting example of MODBUS2 communication driver for GMPC |
Device part of <Figure 1> input Com Port(COM1 or TCP/IP, UDP/IP, etc), Baud Rate(9600), Parity Bit(0), Data Bit(8), Stop Bit(1) respectively according to setting of GMPC.
Baud rate, parity bit, data bit, stop bit can set by using switch of rear or front panel(GMPC controller).
read schedule of MODBUS2 communication driver for GMPC
Read schedule setting parameters are as follows:
1) STATION – GMPC controller station number.
2) Modbus function number – Function number = 4W, 4F, 3W, ....
3) Read start address – Read start address in function memory.
4) Save Start Address for Communication Server – saveing start address of Communication Server.
5) Read Size – Word, Dword, Float, Byte, etc unit Read size. (according to read type)
Read schedule example)
READ, 2, 4W, 0, 0, 3,
FLOAT, 2, 4F, 40, 3, 3,
FLOAT, 2, 4F, 80, 6, 3,
Note) Function number : number = function of modubs, character = reading data type, F:IEEE 32bit Float , X:Bit Device, W:Word Device, B:Byte, D : Double word.
You can write GMPC controller by using write settings.
Digital Write
Digital write setting parameters are as follows:
1) PORT Port no. (0 ~ 255)
2) STATION GMPC controller station number.
3) ADDRESS Write address in modbus memory.
4) Extra1 Function = 5, ....
5) Extra2 Don't care.
Write example 1)
PORT : 0 Station : 2, ADDRESS : 0001, EXTRA1 : 5, EXTRA2 : 0
The setting parameter shown above is CB ON write example of 2 GMPC III.
Analog Write
MODBUS2 communication driver for GMPC model don't need Analog write.