[Dsg-rich] scalers for PMTs on one RICH tile not updating

[Patrizia Rossi]

Hi,
when I started my swing shift yesterday the scalers were all at zero but there was no beam. I called Andrey Kim before we stated the data taking and he recycled the IOC. At that point all scalers where all OK
Indeed I wanted to understand why the scalers stop reading without any apparent problem

patrizia

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# Patrizia Rossi
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> On 22/feb/2018, at 08:22, Tyler Lemon <tlemon at jlab.org> wrote:
> 
> Hello,
> 
> DSG noticed this morning that there is there is a group of three PMTs on the scaler map EPICS screen that are not updating. They have all been at zero for a few hours this morning. Attached is a screenshot with the three PMT scalers as zero. 
> 
> The PMTs in question are PMT 182, 183, and 184. They all look to be on the same electronic board (tile 66) that is read out in SSP slot 5, fiber 1. The temperatures for this board are still being read.
> 
> Scalers for PMTs not updating for long periods until the IOC is rebooted or something else is done seems to be a common occurrence.
> 
> What would be causing the scalers to stop updating while the temperatures are still read?
> 
> Best regards,
> Tyler
> <RICH scalers one tile zero 2018-02-22.JPG>_______________________________________________
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