PM861 problems in redundant
We have new installation of PM861 controllers working in redundant pair. If the controller running as primary and stops, secondary takes over, that part works fine.
If the controller running as primary and I disconnect power and later power on, or shortly press Init button, during controller startup shortly blinks red Fault led and approximately after 40 sec controller goes to fault, red Fault led on. I restart him shortly pressing Init button and his running as secondary.
If the controller running as secondary and I disconnect power and later power on, or shortly press Init button hi startups and his running as secondary.
Voted best answer
Sounds like a known issue, please download the following Product Bulletin from ABB Library/SolutionsBank:
- Strange Behaviour from PM861A and PM864A during test or demo of redundancy, 3BSE085816
With an account, you can use this link: http://search.abb.com/library/Download.aspx?DocumentID=3BSE085816&LanguageC