[Halld-controls] Crate fan speeds

[Hovanes Egiyan]

Hi Fernando,

the fan speeds for most of the crates are not regulated by EPICS, although
they are being monitored. But there is still possibility to set the fan 
speed (and other
fantray parameters) to strange numbers from the front panel, via SNMP, and
even via EPICS bypassing the existing safeguards. The software cannot ensure
that the parameter values are always acceptable. But we can setup alarms 
with
automatic notification getting texted to experts if the parameter value 
is out of limits.
I would need the list of these parameters and system experts (phone#, 
cell carrier name)
to be notified 24/7 when these parameters are out of limits, if we want 
to setup
alarms for VME/VXS crates. We have such setups for a number of systems. 
Let me
know if you think this would be a useful thing to do.

Best,
     Hovanes.



On 01/06/2016 10:51 AM, Fernando J Barbosa wrote:
> Hi Hovanes,
>
> The absolute lower limits for the fan speeds, for both the VME64x and 
> VXS crates, are: 2,500 RPM. Under no circumstances should the fan 
> speeds be operated at speeds lower than 2,500 RPM and the control 
> software should ensure that changes to these lower limits are not 
> allowed.
>
> Thanks and best regards,
> Fernando
>
>