Example¶

Example:¶
MODBUS interface of the client	COM1
Client writes to	Server 1
Data	bBit := TRUE
Source address at client	bBit : BOOL
Target address at server	%MX0.1026.7 : 2017HEX = 8215DEC
The value of the BOOL variable bBit on the server is written to %MX0.1026.7 on the server.

MODBUS request of the client¶
Server address	Function code	Server operand address		Data		CRC
Server address	Function code	High	Low	High	Low	High	Low
01HEX	05HEX	20HEX	17HEX	FFHEX	00HEX	37HEX	FEHEX

MODBUS response of the server (mirrored)¶
Server address	Function code	Server operand address		Data		CRC
Server address	Function code	High	Low	High	Low	High	Low
01HEX	05HEX	20HEX	17HEX	FFHEX	00HEX	37HEX	FEHEX

Parameterization \ of the COM_MOD_MAST Function Block inputs¶
EN	COM	SLAVE	FCT	TIMEOUT	ADDR	Number of bits	DATA
FALSE -> TRUE	1	1	5	Application- specific	8215	1	ADR (bBit)