IAC Communication timeout during OLU
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
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