Undulator won't move because it is locked

[andrewmkiss]

We have been hoping to have fly scanning of our undulator and monochromator since opening to general users. However, it is just getting going now. Dean Hidas and @mrakitin have been working hard to get this going in bluesky.

Currently, you need to enable this coordinated motion on a CSS page, under the Operator page for the 5-ID insertion device, there is a button for scan mode. From there you can see all the options. Enabling fly-scan is done by setting 1 to SR:C5-ID:G1{IVU21:1}MACROControl-SP.

If this mode is enabled, then the undulator cannot be moved in bluesky (energy.move(new_energy)) doesn't work. Can we put in some checking to see if there is write access to the undulator PVs, or maybe disable the fly-scan mode and then perform the move?