Beckhoff Knowledge Base: Communication with the WRF08 RS485 MODBUS room control unit by Thermokon

Introduction

 

 

The following example shows how you can communicate between TwinCAT and the eight-button WRF08 8T RS485 MODBUS room control unit by Thermokon (www.thermokon.de). The example is restricted to basic functions in order to integrate the room control unit in an application.

 

Connecting the WRF08 RS 485 MODBUS room control unit - introduction 1:

 

Connecting the WRF08 RS 485 MODBUS room control unit - introduction 2:

There are different versions of the room control unit with respect to the number of function buttons. The device has an internal temperature sensor. The function buttons can be scanned and the display controlled via the Modbus communication interface.

Connecting the WRF08 RS 485 MODBUS room control unit - introduction 3:

 

Requirements

 

Overview

Application examples Comment
Application example: Connecting the WRF08 RS 485 MODBUS room control unit - introduction 4: PLC_KL6041.zip Target platform CX (ARM)

 

Libraries to be linked:

Connecting the WRF08 RS 485 MODBUS room control unit - introduction 5: