This document is a technical specification of a product. The product is a smart watch. The product is made by the brand A and the model is B.
The PH/ORP800 controller uses an asynchronous serial communication interface that complies with RS232C, RS422 and RS485 standards. All three interfaces are optically isolated and support a master‑slave communication mode.
The document details the communication process, supported baud rates, data format, command frame structures for reading and writing parameters, and provides a table of communication parameter codes. This manual is written in Chinese.
| Supported communication interfaces | RS232C, RS422, RS485 |
|---|---|
| Interface isolation | Optical isolation |
| Maximum instruments on RS485 | 100 instruments |
| RS485 communication distance | 1 km |
| RS232 communication distance | 15 m |
| Supported baud rates | 300, 600, 1200, 2400, 4800, 9600, 19.2k bps |
| Data format | 1 start bit, 7 data bits, 1 parity bit, 1 stop bit |
Up to 100 instruments can be connected on a single RS485 communication port.
The controller returns an ACK (06H) signal to indicate successful parameter modification.
The controller supports baud rates of 300, 600, 1200, 2400, 4800, 9600 and 19.2 k bps.