Redundant PM867HI with SM812 desynched and synched
i am new in this forum, cheers to everyone here,
i working on DCS system for steam powerplant 800xA 603 AC800M with SIL-3 for powerplant protections
since a day ago, i had SM812 desynched, BC810 and coupled 867HI were fine, but some functions such as BMS got stucked.
Access enable on master SM812 was dead, sec SM812 was desynched, i rethighned terminal i2, prim SM812 returned to normal,
and feew minutes later they got synched.
however after hours, both were desyched, i changed prim and sec SM812 position, and are fine till now.
all commands on ESD and BMS are fine too.
the changes were done when plant short stopped.
please advise me, why this thing could happend like this,
thanks a lot for your answer
Insert the URL that your highlighted text will link to.
Copy the video's "embed" tag into Embedded Video below.