Industrielle styresystemer - Wiki
To send and receive data on Master side we need to use 2 channels:
To send or write data we need to use channel 0 with access type Write Multiple Registers (Function Code 16).
Since we have decided to use approximately 8 variables, the length will be set to 10 (this value can be changed).
To receive or read data we need to use channel 1 with access type Read Holding Registers (Function Code 03).
Since we have decided to use approximately 8 variables, the length will be set to 10 (this value can be changed).
NB! We need to change Offset from 0011, because of values from 0 to 10 are allready assigned to Channel 0.
All mapping we can do at ModbusTCP Slave I/O Mapping.