This guide explains how to set up standard Modbus RTU communication between a Siemens KTP700 Basic DP panel and a C470 controller using WinCC V14.
The operation guide describes the software and hardware environment required for establishing standard Modbus RTU communication between a Siemens KTP700 Basic DP panel and a third‑party C470 controller. It covers the necessary WinCC V14 version, CoDeSys V2.3, and the RS422‑RS232 converter needed for the connection.\n\nStep‑by‑step instructions are provided for physical wiring, port configuration, parameter settings (baudrate, data bits, parity, stop bits, slave address), and verification of communication using real‑time monitoring in CoDeSys and WinCC. Additional resources such as the panel download manual and Modbus patch package are listed. This manual is written in Chinese.
| Panel interface | RS422 |
|---|---|
| Converter required | RS422‑RS232 converter |
| Power supply | Siemens PS307 24 V |
| Serial connector | 9‑pin serial male header |
| Baudrate | 19200 |
| Parity | None |
| Slave address | 1 |
You need a Siemens RS422‑RS232 converter, a 9‑pin serial connector, the PS307 24 V power supply, and appropriate wiring cables.
Set the connection type to RS422, baudrate to 19200, data bits to 8, parity to None, stop bits to 1, and slave address to 1.