Is it possible to downgrade the AC500 PM591 controller firmware? If yes, how?
Two years ago we installed PM591 on our customer site. The version of Automation Builder is Ver.2.1. This August we purchased a new PM591 to add a controller to this plant. This PM591 had a firmware version of Ver.2.3. Automation Builder does not seem to be able to downgrade PM591.
Is it possible to downgrade the AC500 PM591 controller firmware? (Ver.2.3 → Ver.2.1.)
Voted best answer
try to download a document with the name 1SAP190800R0221 from the ABB library.
This is an update to that version of SW - 2.21 in fact - that you can do using an SD card.
I have never tried to downgrade a CPU, I think it is not possible from Automation Builder but using an SD card probably yes.
Hope this help you