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MicroLogix 1400 “Modbus RTU” Autonics TK4S Tutorial

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Hello friends!
In the previous article wrote a tutorial on how to use MicroLogix 1400 to connect and control Omron E5CC Controller, today I will continue to guide you to use MicroLogix 1400 to control another Temperature Controller is Autonics TK4S.

In this project uses MicroLogix PLC Model “1766-L32BXB” and Autonics Controller Model “TK4S-T4SN“. Please pay attention to choose to buy Model Autonics TK4S with RS485 communication support, then we can control it with Modbus RTU

MicroLogix 1400 & Autonics TK4S “Wiring Diagram”

+ You can wire it directly through the MiniDIN-8Pin port or use the 1763-NC01 Module for easier wiring

+ If the communication distance is long, we need to add a 120(Ω) Terminal Resistor

Autonics TK4S “Modbus RTU” Parameters Setting

Below is a table of Modbus RTU (RS485) communication parameters that need to be installed for Autonics TK4S Controller, you can install the same as installed.

TK4S >>> Mode >>> PAr.4

+ AdrS = 1 (Modbus Slave)

+ bPS = 9.6 (9600bps)

+ Prty = EvEn (Parity check)

+ StP = 1 (Stop bit)

+ rSy.t = 20 (Response time)

Autonics TK4S Registers Address
Note: MicroLogix 1400 Address = “VFD Address (Dec) + 1

+ Register Address for Set Temperature

  • Funtion Code = 06
  • Address = 0000 + 1 = 1

+ Register Address for Temperature Monitoring

  • Funtion Code = 04
  • Address = 03E8 (hex) + 1 = 1000 (dec) + 1 = 1001

MicroLogix 1400 “PLC Programming”

+ Read/Write Distribution

+ Autonics TK4S Modbus-RTU Control

+ TK4S (1) Temperature Setting

+ TK4S (2) Temperature Setting

+ TK4S (1) Temperature Read

+ TK4S (2) Temperature Read

Detailed Instruction Video


Documents Reference

>>> MicroLogix 1400 Manual PDF Download
>>> Autonics TK4S Manual PDF Download

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