Each destination has its own set of diagnostics PVs:
Desired Rate PV: TPG:SYS0:1:<DST00>:REQRATE
Actual Rate PV: (Under approval + development -not currently available) TPG:SYS0:1:<DST00>:RATE_RBV
MPS Beam Class RBV: TPG:SYS0:1:<ALW00>:MPSSTATE
Timing Beam Class set PV: TPG:SYS0:1:<ALW00>:MPSSETSTATE
Timing Beam Class RBV: TPG:SYS0:1:<ALW00>:MPSLATCH
The destinations are currently 16 and the name in the PV increments from DST00/ALW00 to DST15/ALW15, with the following association to actual Destinations:
...
DST09 SC1 S30XL mask = 0x200
DST10-DST15 Reserved for future destinations. The destinations list/order is defined by Patrick K. in his Beam Operational modes document.