To send and receive data on Server side we don't need to add any channels. They will be on the Master side only.

NB! The Server side uses Holding Registers to read data and Input Registers to send data.

NB! Data transmission 

Step 1. Modbus TCP Slave Device I/O Mapping - Enabled 2 (always in bus cycle task)


Step 2.  We have the same rule like on master side to have the register 0 for BOOL variables only. 

En example for Holding Registers - INPUT


En example for Input Registers - OUTPUT


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