Crosses appearing on graphics
There are 15 wellheads connected to our system and two more wellheads added to the same 800XA system from another location. Problem is crosses are appearing and clearing itself frequently on four out of 15 wellheads graphics (including the two wellheads on seperate location). MMS comms failure alarm is appearing and clearing itself for one of the wellhead of two. OPC is seen connected for all the wellheads (OPC DA & OPC A&E). All wellheads are connected to redundant connectivity servers. The problem was rectified by restarting the servers. Question is why crosses are appearing only on particular wellhead graphics even though OPC is showing healthy. Same time MMS comms failure alarm generates on two wellheads.
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