[Dsg-rich] [Rich] FPGA temp alarm

[Tyler Lemon]

Hello Marco, 

The hardware interlock system does not monitor FPGA temperatures. It monitors the RTDs installed in the EP. 

The hardware interlock system did not trip off the electronics because the strange temperature readings were only seen on the FPGA temperature readouts. 

Best regards, 
Tyler 


From: "Mirazita Marco" <Marco.Mirazita at lnf.infn.it> 
To: "Valery Kubarovsky" <vpk at jlab.org> 
Cc: rich at jlab.org, "dsg-rich" <dsg-rich at jlab.org> 
Sent: Tuesday, October 16, 2018 8:16:06 AM 
Subject: Re: [Rich] [Dsg-rich] FPGA temp alarm 

Hi Valery, 
thank you, in fact my main worry was that the interlock didn't shut down 
the electronics. 
It would be anyway good to understand why we had this event. 
I saw from the strip charts that also the LV currents and voltages have 
frequent random spikes. 
Marco 


Il 2018-10-16 13:55 Valery Kubarovsky ha scritto: 
> Marco, 
> If you take a more careful look you will find out that the LV was shut 
> down. 
> The HV was off. We investigate the reason. It is the first time we had 
> such an event. 
> Probably it was connected with the software update that was done 
> approximately at the same time. 
> Regards, 
> Valery 
> 
> ------------------------- 
> 
>> FROM: "Marco Mirazita" <Marco.Mirazita at lnf.infn.it> 
>> TO: dsg-rich at jlab.org, rich at jlab.org 
>> SENT: Tuesday, October 16, 2018 4:03:24 AM 
>> SUBJECT: [Dsg-rich] FPGA temp alarm 
> 
>> 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 
>> 
>> _______________________________________________ 
>> Dsg-rich mailing list 
>> Dsg-rich at jlab.org 
>> https://mailman.jlab.org/mailman/listinfo/dsg-rich 
> 
> _______________________________________________ 
> Dsg-rich mailing list 
> Dsg-rich at jlab.org 
> https://mailman.jlab.org/mailman/listinfo/dsg-rich 
_______________________________________________ 
Rich mailing list 
Rich at jlab.org 
https://mailman.jlab.org/mailman/listinfo/rich 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://mailman.jlab.org/pipermail/dsg-hallb_rich/attachments/20181016/7129f701/attachment-0002.html>