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King Pigeon Hi-Tech. Co., Ltd.
Ver 3.0
GSM/SMS/GPRS/3G/4G
Cellular IoT M2M RTU
9.5 Modbus TCP Protocol
Device can connect to server or cloud to build TCP connection automatically via GPRS/3G/4G networks. After
building TCP connection, server or SCADA or cloud can send Modbus TCP command to device for Modbus TCP
communication.
9.6 Modbus RTU Over TCP
After device switched on, automatically connect to server or cloud to build TCP connection via GPRS/3G/4G
networks. Users can set handshake protocol, login message, heartbeat or other parameter according to cloud
server. After TCP connection, server or SCADA or cloud can send Modbus RTU command to device, to build
Modbus RTU networks which based on TCP connection.
For Modbus RTU over TCP protocol, setting as below:
(1) In "Basic Parameter" setting, set device ID, range 1~247 in Modbus RTU protocol, click "Save" as below:
(2) In "Cellular network setting" page, "Communication Data" choose "Modbus RTU Protocol", means
communication with Modbus RTU over TCP. After setting server IP/DNS and other parameter, click "Save"
button as below: