thomas.vo@LIGO.ORG - posted 14:14, Thursday 27 February 2014 - last comment - 13:08, Friday 28 February 2014(10378)
ITMY Ring Heater
The readback channels for the corner station ring heaters seem to not have been working properly since last Friday. I've attached a graph that shows that the ring heaters seem to have turned off at 02-21-2014 22:5:32 UTC. Judging from the ALOG around that time, there were a lot of reboots going on in software, I'm not sure about hardware reboots. However, Kiwamu says that the PRC power level is looking like the ring heaters are on just based off of the amount of loss he measured. He also advised that since the system is working well, I should hold off on trying to power cycle the TCS chassis until a later time but at the first chance I get, we should try to resolve this issue. The ITMX ring heater is also displaying similar weirdness, which is expected since they share the same chassis and PLC.
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Kiwamu, Sheila, Thomas This morning seemed to be a good time to investigate this issue. At first we saw that the PLC3.pro was connected to EPICS but not to the System Manager, i.e. the ADC channels were not getting from the hardware to the TwinCAT software. We tried re-running the install scripts but it did not fix the problem but it did help us figure out that there were some channels deleted recently. Daniel let us know that if there are some additions or deletions, we should re-map the configuration before recompiling. This solved the problem!