WP12529

Jonathan, Erik, Daniel, Dave:

The EDC on h1susauxb123 was restarted to ensure a clean connection to the Beckhoff slow controls EPICS channels. Following Daniel's restart of the slow controls IOC yesterday for a code change, it was noted that the EDC was still serving the old value while caget was reporting the correct value. Later when the channel was manually switched the EDC obtained and served the correct value. Testing of a random sample of about 400 channels out of 35,588 did not find any other channels in error, but to be sure we did the EDC restart this morning.

No full DAQ restart was required.

The EPICS channel data gap while the EDC was being restarted was 27 seconds. Attached plot of a vacuum channel shows the details.