# Diagnose CP360

**URL:** <https://community.br-automation.com/t/diagnose-cp360/9839>\
**Category:** B&R Software & Runtime\
**Tags:** plc\
**Created:** [January 22, 2026, 7:03pm UTC](https://community.br-automation.com/t/diagnose-cp360/9839 "2026-01-22T19:03:11Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![Jose\_Veliz](https://avatars.discourse-cdn.com/v4/letter/j/FF8800/32.png) [@Jose\_Veliz](https://community.br-automation.com/u/Jose_Veliz)\
**Post date:** [January 22, 2026, 7:41pm UTC](https://community.br-automation.com/t/diagnose-cp360/9839/3 "2026-01-22T19:41:52Z")

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Hi, thank you for your response

Sorry I didn’t mention this but I’ve tried serial communication with RUC and this [script](https://community.br-automation.com/t/determine-serial-online-connection-parameters-sg3-legacy-systems/2662)

The serial number is 56520186979

This is the online settings tab on AS 4.2

![Screenshot (6) - Copy](https://europe1.discourse-cdn.com/brcommunity/original/2X/1/130d3a2250b44922a281d1d0107b1f7beeef1ba2.png)

This is the error I get sometimes

 ![IMG20260121100238 - Copy](https://europe1.discourse-cdn.com/brcommunity/original/2X/1/158857f19a811ebd83e98503766852011953ad3c.jpeg)

Status LEDs

 ![IMG20260121111449](https://europe1.discourse-cdn.com/brcommunity/original/2X/0/03ef015bcaf45c3579fdbcddd63d5b7136002088.jpeg)

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