Add reading of per period uah

[FreddieAkeroyd]

See ISISComputingGroup/IBEX#8499

This PR also improves NORD readback behaviour

[iangillingham-stfc]

[FreddieAkeroyd]

Hi, mine does this if there is a mismatch in ISISICP version or registration. Did you update ISISICP via update_dev.bat as per ISISComputingGroup/IBEX#8499 including doing the register_server as admin bit it mentions at the end?

[FreddieAkeroyd]

Actually, i've noticed that the admin register bit was commented out of update_dev as it didn't work at that point due to different paths, i've now fixed that so you should run update_dev again and this time there should be a register program to run. Registration only needs to be redone if a new function is added to the interface, last time that happened was three years ago so not very often

[iangillingham-stfc]

 C:\Instrument\Dev\ibex_bluesky_core :: 20_user_facing_dae                                   |  ibex_bluesky_core | 15:42:49
➜ caget TE:NDW2920:DAE:SPEC:0:1:XE.NORD
TE:NDW2920:DAE:SPEC:0:1:XE.NORD 50

 C:\Instrument\Dev\ibex_bluesky_core :: 20_user_facing_dae                                   |  ibex_bluesky_core | 15:43:00
➜ caget TE:NDW2920:DAE:SPEC:0:1:X.NORD
TE:NDW2920:DAE:SPEC:0:1:X.NORD 50

Shouldn't XE have size one more than X?

[FreddieAkeroyd]

It should indeed. It was been fixed before and not updating if the spectrum changed size (which doesn't usually happen, but i though i should allow for it). However when i added the automatic update, i didn't add the +1 to that. Now resolved.