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Yes I have upgraded firmware of both CPU one by one with the other one switched off but CEX Bus cable and RCU link cable connected between the two.
Please help. The matter is very urgent. If possible please provide your email I'd so that I can communicate later
Then check the cabling... RCU and CEX bus cable. If these are OK I don't know how to proceed.
Should there be any X1 and X2 marking on CEX Bus cable, what is the purpose of the marking
Looking to urgency and criticality, recomended to contact with local ABB support line.
In your contry call toll free number 1800 420 0707 and firstname.lastname@example.org.