IAC Communication timeout during OLU
During OLU at Step7 when we Switch Primary (Handover Time) , the First Alarm which comes out in the Alarm list is "IAC Communication Timeout",
these "IAC Communication Timeout" Alarms will also comes for all the other Controller to which it is communicated (IAC Clients ).
Is it is Normal ?
System Version:ABB800xA 5.1 FP4 Rev-E , AC800M
these "IAC Communication Timeout" Alarms will also comes for all the other Controller to which it is communicated (IAC Clients ).
Is it is Normal ?
System Version:ABB800xA 5.1 FP4 Rev-E , AC800M
Asked 10 months ago
Answers
0
Hi
Greetings!!
Before Online Upgrade is started, check that the “Online Upgrade Handover Limit” is set in accordance with the time demands of the process under control. If the application includes IAC or MMS, the extended communication time-out during OLU needs to be considered as well. If the defined Online Upgrade Handover Limit is exceeded, the Online Upgrade procedure will be interrupted, and a roll-back of control to the Primary will take place. The Online Upgrade timeout is used for SIL1-3 as well as for nonSIL applications.For Details, refer Online Upgrade on Pg 162 of 3BNP004865-518 RevA or similar document 
Best Regards
Answered 10 months ago
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