PLC Guides Sensor Guides

Siemens S7-200 “Modbus RTU” Autonics TK4S Tutorial

Written by

Hello everyone, in the previous article showed you how to use Siemens S7-200 PLC connected to Omron E5CC temperature controller via Modbus-RTU communication protocol, today I will continue guide you to control another temperature controller is Autonics TK4S

We need to choose Model Autonics TK4S with RS485 communication support (In project uses model TK4S-T4SN). With PLC Siemens S7-200 we can use Port.0 or Port.1 (for PLC with 2 CPU ports).

Siemens S7-200 & Autonics TK4S “Wiring Diagram”

RS485 communication connection diagram between PLC Siemens S7-200 and temperature controller Autonics TK4S

Autonics TK4S Modbus Parameters Setting

To be able to control Autonics TK4S using Modbus-RTU communication protocol, we need to set the following parameters:

Autonics TK4S Modbus Registers Address
Note: Siemens S7-200 Holding Registers Address =
“VFD Address (Dec) + 40001

>>> Temperature Setting Address = 40001 + 0 (dec) = 40001 (dec)

>>> Temperature Monitoring Address = 40001 + 3E8 (hex) =
= 40001 + 1000 (dec) = 41001 (dec)

PLC Programming

+ Communication Distribution

+ Modbus Configuration

+ Setting Temperature

+ Read Temperature Present

Video Tutorial


+ Siemens S7-200 Programming Software Download
+ Autonics TK4S Manual PDF Download

If in the process of using PLC Siemens S7-200 to control and monitor Autonics TK4S Controller you need any support, please comment below the article, will reply to you as soon as I read the comments.

Best Regards!

About the author

Leave a Comment Protection Status