About Modbus communication

Device works as a Modbus slave over RS485 and Ethernet.
It doesn’t support Modbus over 4G and Wi-Fi

(1) Modbus RTU over RS485
RS485 runs in Modbus slave mode, Modbus master read/write IO channels of CWT7100 over RS485

(2) Modbus TCP over Ethernet
Modbus master read/write IO channels of CWT7100 over Ethernet

below is register map

The complete Modbus protocol documentation is provide in the device’s installation package

Author：admin  Create time：2023-12-10 04:57
Last editor：admin  Update time：2023-12-11 10:03