[Dsg-rich] FPGA temp alarm

[Marco Mirazita]

Hi all,
yesterday at about 4:20 pm jlab time I received several alarm messages 
saying that the FPGA temperatures reached values around 115 deg.
Since it looked like a readout error, I checked the strip chart, where 
there is actually a spike in the readout at that time, but to values of 
the order of -10^5. See the attached plot.
So, it is clear that it was a readout error, but it is strange that the 
alarm message and epics report different values.
Also, according to the logbook, the electronics was not shut down by the 
interlocks, as should have happened if the temperature really went above 
100 deg.
So, perhaps the values reported in the alarm messages are not the 
correct ones?
Marco

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