Came into the control room this morning to find that the laser had tripped.  Went to
see the Beckhoff PC and the status indicator showed "Power error (WD)" illuminated.
Not sure what caused the the reduction in power.  I do know that this morning the
lights in my office flickered a couple of times, which may or may not coincide with
the laser's power demise.  We will check the UPS log and see if it registered a switch
to batteries or something like that.