Ham 6's fast shutter seemed to have an issue.
I noticed on the OPS overview screen that HAM6  fast shutter was bright red.
I checked the details and noticed an Error:
Protection in Fault; Power Interlock is 
I took ISC_lock to IDLE. 
Went to AS Port Protection screen.  I didn't get a screen shot of it but it looked like this screen shot from alog 87915
Got it working again, 
The Fast Shutter Guardian was in fault with an init and got back to locking.