This document describes how to use the CRP5 Clean Room Panel Modbus protocol. It covers the protocol structure, data format, and how to read and write the various registers in the CRP5 Clean Room Panel using Modbus protocol.
The Rotronic CRP5 Clean Room Panel supports Modbus RTU over RS485 and Modbus TCP over Ethernet. The document explains the protocol structure, data formats for 16-bit integers, 32-bit floats, and 32-bit integers, including configurable swap modes for Rotronic devices.
The manual details the mapping of Modbus fields to specific CRP5 functions, including relays, valves, maintenance modes, and sensor actions. It provides specific instructions for reading and writing coils, discrete inputs, input registers, and holding registers to control device settings and monitor status.
| Modbus RTU Baud Rate | 19200 Baud |
|---|---|
| Modbus TCP Port | 502 |
| Modbus RTU Address Offset | RS485 Network Address + 1 |
| Data Endianness | Big-Endian |
No, Modbus ASCII is not supported by the CRP5.
The parameters are 19200 Baud, 8-bit data, no parity, and cannot be changed.
No, the Modbus TCP port is fixed at 502.