This manual introduces the communication protocol of the diesel generator controller, including connection methods, MODBUS protocol conventions, register addresses, read registers, write registers, CRC redundant checks, data types and register definitions
The document explains the communication interfaces supported by the controller, including RS232, RS422 and RS485, and defines the Modbus settings such as 9600 baud, 8 data bits, 1 stop bit and RTU mode. It also provides wiring diagrams for the D‑SUB9 connectors used on both the controller and PC sides.
Detailed register tables are given, showing the address, function code, data format and CRC calculation for each register. The manual lists alarm registers, data types (e.g., unsigned integer, BCD date/time) and the polynomial used for CRC (X16+X12+X5+1). This manual is written in Chinese.
| Baud rate | 9600 |
|---|---|
| Supported interfaces | RS232, RS422, RS485 |
The controller uses a baud rate of 9600 for Modbus communication.
CRC is calculated using the polynomial X16+X12+X5+1.