Using The Programming IDE / Resources / Networks

Modbus TCP

ModbusTCP functionality includes reading or writing to Modbus Holding Registers (4:xxxx registers in Modbus syntax).

Server

External ModbusTCP clients can have read/write access to your User Program Variables. You declare which of your variables can be accessed and the relative address offset from 4:0000 the data will appear.

*Please note that Modbus Holding Registers are 16 bit INT data type. If you select a variable that is a DINT data type, it will use 2 Holding Registers.

Client

This function is reserved for future use.