There was a PSL Beckhoff chassis that needed to be powered on. There is an alog saying that I configured the PSL PLC and IOC to start automatically, so maybe this is what kept it from doing so?
I physically power cycled the BRS Beckhoff machine at end X. It was unreachable from remote desktop and in a bad frozen state when I connected to it from the KVM switch.
I started the end X NCAL PLC and IOC, the end X mains power monitoring PLC and IOC, and the corner station mains power monitoring PLC and IOC.