OMRON CompoWay/F protocol module on Temperature Controller E5AC

Keyword

Python , module , method , library , OMRON , CompoWay/F protocol , serial IF , Binary I/O comunication , Temperature Controller like E5AC ,　Digital Controller , without RS-485 communication IF model , Enable Manual Mode

Overview

It helps to operate an OMRON digital controller from an external PC. The device used is an OMRON E5AC-TCX4ASM-000¹ digital controller without an RS-485 communication IF.

Function

Below functions are available, as libraries for Omron Digital Controllers.

1. Allocate serial IF communication
2. Typical CompoWay/F protocol command and response
3. Enable Manual Mode
4. Read temperature
5. Set output value

[!TIPS]

1. CompoWay/F bautrates is 38400bps, not 9600bps.
2. BCC(Block Check Character) is 8-bit value that is the result of an EXCLUSIVE OR sequentially performed between each 8-bit in a transmission.²³
3. The EXCLUSIVE OR module: copied from GitHUB TurBoss website.⁴

Hardware Environment

1. Temperature Controller : OMRON E5AC-TCX4ASM-000 Digital Controller without RS-485 communication IF.¹⁵⁶
2. USB: OMRON USB Serial Conversion Cable E58-CIFQ2 ⁷
3. PC: windows PC

Software Environment

1. OS: Windows11
2. Python: Version 3.9.13
3. Libraries: PySerial

Known issue

1. None

Rerated Program

This program is useful for a temperature control program.⁸

Rerated Webpages

Footnotes

1. OMRON Digital Temperature Controllers E5AC Catalog ↩ ↩²

2. Frame Checksum (FCS)....EXCLUSIVE OR ...expressed in ASCII Characters ↩

3. Block Check Character(BCC)....EXCLUSIVE OR ...expressed in bytes. ↩

4. FCS module from TurBoss/TurBoHostLink ↩

5. OMRON Digital Temperature Controllers User’s Manual E5@C ↩

6. OMRON Digital Temperature Controllers Communications Manual E5@C ↩

7. OMRON Conversion Cable E58-CIFQ Catalog ↩

8. Temperature Control ↩