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MicroLogix 1400 “Modbus RTU” Omron E5CC Tutorial

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Hello friends!
Monitoring and storing temperature in factories and machines is increasingly necessary in today’s factories, today will guide you to use the Allen-Bradley MicroLogix 1400 PLC to connect and control Omron E5CC Temperature Controller

The PLC model uses is MicroLogix 1400 “1766-L32BXB” and Omron “E5CC-RX2ASM-802”. You must use Omron E5CC Controller with R485 support to be able to use Modbus-RTU

MicroLogix1100 & Omron E5CC “Connection Diagram”

+ You can use Module 1763-NC01 to easily connect or connect directly to the RS485 port of MicroLogix 1400 (MiniDIN 8Pin – Female)

+ If the communication distance is >50m, there is no need to use a 120Ω Terminal Resistor

Omron E5CC Modbus RTU Configuration

To be able to control Omron E5CC with “Modbus RTU”, we need to set the parameters as shown in the table below:

Omron E5CC Registers Table
Note: MicroLogix 1400 Address = “VFD Address (Dec) + 1

>>> Set Temperature Address = 2103 (hex) + 1
= 8451 (dec) + 1 = 8452

>>> Read Temperature Present Address = 2000 (hex) + 1
= 8192 (dec) + 1 = 8193

MicroLogix 1400 “Modbus-RTU” Setting

We need to configure the communication parameters for the PLC to be the same as those installed for the E5CC Controller

MicroLogix 1400 “Modbus” Example

+ Auto Read/Write Distribution

+ Read/Write Temperature Control

+ E5CC (1) Temperature Write Command

+ E5CC (2) Temperature Write Command

+ E5CC (1) Temperature Monitoring

+ E5CC (2) Temperature Monitoring

Video Tutorial



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If you need assistance in using MicroLogix 1400 PLC to connect to Omron E5CC via Modbus RTU, please comment below the article, will reply to you as soon as I read the comment.

Best Regards!

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