The PanelView+ and Factory Talk View ME have an issue with the alarming I/O. I have found that if the comms with a PLC fails and then is restored, some of the tags in the alarms stop updating. One fix for this is to reboot the PanelView+ terminal (cycle power). I have reported this to A-B, however as the issue is random and intermittent, I have not recieved any solutions.