I've added a scripted VMon/coil-enable test to PyIFOTest following the suggestion in #15542. Basically, a DC offset is added to one fast coil output at a time, and all the VMon responses are checked.

After resolving the swapped ITMX/ITMY eurocrate slots described in #14584, I ran the new scripted VMon test on all eight optics managed by c1susaux. All of them passed: SRM, BS, MC1, MC2, MC3, PRM, ITMX, ITMY. This is not the final suspension test we plan to do, but it gives me reasonably good confidence that all channels are connected correctly.