The following Modbus function codes are supported by the M340 PLC line:
Function Code Description
1 Read output bits
2 Read input bits
3 Read output registers
4 Read input registers
15 Write output bits
16 Write registers
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The following Modbus function codes are supported by the M340 PLC line:
Function Code Description
1 Read output bits
2 Read input bits
3 Read output registers
4 Read input registers
15 Write output bits
16 Write registers