Functionality for disabled NC axes and integration with ads-ioc

[klauer]

Question: Should pytmc/ads-deploy not generate a motor record for disabled NC axes?

Sub-question: can a disabled-at-build-time NC axis be dynamically enabled during runtime?

In my opinion:

• If the answer to the sub-question is "no", then pytmc/ads-deploy should skip the axis entirely.
• If the answer to the sub-question is "yes", then pytmc/ads-deploy may (should?) create a motor record

cc @slactjohnson @ZLLentz @slacAWallace

[ZLLentz]

I don't think any item in the TwinCAT tree can be dynamically enabled during runtime. I've always needed to reactivate config, so I assumed that a disabled item wasn't even sent to the PLC- could be wrong on the implementation detail, but I'm pretty sure that you cannot (and am 100% sure that you should not) enable NC items dynamically during runtime.

[klauer]

Then that solves it: pytmc/ads-deploy should skip the axis entirely.