During the access I noticed the set current for the LQ1 was displayed as zero in EPICS. The Archiver also has the set value recorded as zero. The readback was reasonably stable. The Archiver shows this has been going on since June 8. I turned off the software regulator and entered 475 into the set current field. The magnet responded. I turned the software regulator back on and it adjusted the set current to the required value.