patrick.thomas@LIGO.ORG - posted 10:00, Saturday 26 November 2016 - last comment - 12:34, Saturday 26 November 2016(31854)
Beckhoff issues (h1ecatc1)
It appears the problem is either with ISC Common L20, ISC Common M0, or the link between (see attached screenshots). I will go out to the CER and take a look.
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I tried slowly power cycling the ISC Common chassis in the CER twice. Each time it came back in the same state. Since the problem is reported as being between two terminals internal to the chassis, I'm not sure what else can be done without pulling the chassis out of the rack.
I've left a voice message with Richard. I want to touch base with him before I go further.
Richard came in and we opened the top of the chassis in situ. We swapped the internal cables around and determined that the problem was with the ISC Common M0 module. This is the EK1100 EtherCAT module in the middle row of the ISC Common chassis. We replaced that module and it is back up and running. The only cable removed during this was one of the Ethernet cables in the back of the chassis. This cable should be replaced with a longer one. The serial number of the module that was replaced is 04110621.