Overview
Cavity BPMs are inputs to the LCLS MPS. They are used to prevent a large orbit in the undulator which could damange undulator magnets or other beamline components."
There are 36 cavity BPMs grouped into 4 IOCs. Each IOC sends a hardware summary signal to a MPS linknode.
This display shows the four summaries. You can drill down to see individual IOC interlock diagrams, to change limits, bypass BPMs, etc. There is more help from those displays.