SOFB SyncBPMs command doesn't do everything necessary to sync BPMs, as done by TrigAcqConfig command.

[ericonr]

The FOFB HLA uses the SI-Glob:AP-SOFB:SyncBPMs-Cmd PV to sync the FOFB network, but that doesn't always work. In many cases, it's necessary to sync the BPMs from the SOFB HLA, using the SI-Glob:AP-SOFB:TrigAcqConfig-Cmd PV.

There's some additional work done by TrigAcqConfig which makes the BPM synchronization succeed and allows us to close the FOFB network.

dev-packages/siriuspy/siriuspy/sofb/orbit.py

Lines 418 to 442 in 6aaafa4

	def acq_config_bpms(self, *args):
	"""."""
	_ = args
	msg = "Configuring BPMs..."
	self._update_log(msg)
	_log.info(msg)
	mask = self._get_mask()
	for i, bpm in enumerate(self.bpms):
	bpm.put_enable = mask[i]
	if self.is_multiturn():
	bpm.switching_mode = _CSBPM.SwModes.direct
	bpm.configure()
	self.timing.configure()
	elif self.is_singlepass():
	bpm.switching_mode = _CSBPM.SwModes.direct
	bpm.configure()
	self.timing.configure()
	elif self.is_sloworb():
	bpm.switching_mode = _CSBPM.SwModes.switching
	self.sync_bpms(None)
	msg = "Done configuring BPMs!"
	self._update_log(msg)
	_log.info(msg)
	return True

Seems to be essentially the switching mode setting that's the difference (sync_bpms is the function called by the SyncBPMs PV). Will have to wait for an occasion where synchronization via the FOFB HLA fails, so we can check the switching mode of all BPMs... I'm not sure there's any other available option.

@fernandohds564 @anacso17 @augustofg @guilhermerc

[fernandohds564]

@ericonr, these times the FOFB synchronization does not work, is the switching turned off? If yes, then probably this is the cause indeed. If not, I don't see how setting the switching PV would make any difference, apart from some bug in the BPM IOC, maybe?

[ericonr]

@ericonr, these times the FOFB synchronization does not work, is the switching turned off?

I don't know! We didn't check for it. Now we know we have to look at that when the synchronization doesn't happen.