[evla-sw-discuss] Feed heaters

[Hichem Ben Frej]

Are we talking about the F320? I don't any reference to the feed heaters 
in the F317 ICD.

Hichem

Bryan Butler wrote:
> you mean the software to turn them on automatically, i presume, since the option 
> to override that will reside in the M303.
>
> either in the F317 or the antenna server (which is now embodied in 
> AntennaPhysical) seems the only logical places.  if pete or hichem told me it 
> was easy to put an "ostream watcher" in the F317, i'd say put it there, because 
> it's closer to the "instrument".  otherwise, put it in AntennaPhysical.
>
> 	-bryan
>
>
> On 12/20/06 14:09, Barry Clark wrote:
>   
>> The point remains that the feed heaters are being left on much more than they 
>> should be.  I think we need software to correct this situation.  Think green.
>>
>>
>>     
>>> The control for turning the feed heaters on and off is on the f320 and 
>>> m303 screens.
>>>
>>> --Rich
>>>
>>> Bryan Butler wrote:
>>>       
>>>> i thought at one point that rich was going to put this control onto the F317 
>>>> operator's screen (the equivalent of 1 + 2 below)?
>>>>
>>>> rich can correct me if wrong, but my recollection is of seeing a diagram that 
>>>> bob hayward gave rich, which had the feed heater info (and ability to control) 
>>>> on it.
>>>>
>>>> 	-bryan
>>>>
>>>>
>>>> On 12/20/06 10:02, Barry Clark wrote:
>>>>   
>>>>         
>>>>> Jim Ruff was just in my office asking about automated control of the
>>>>> feed heaters.  They should be turned on/off by the dewpoint depression
>>>>> below ambient, as found from the weather station.  Implementation should
>>>>> wait for the installation of the M303, where the control will eventually
>>>>> be moved.
>>>>>
>>>>> Three possible places to put this code:
>>>>> 1.  Operator's screen.  Approach would be same as for VLA - if software
>>>>> believes heaters are in wrong state, tell operators, who then have a
>>>>> way to send command to all known MIBs.
>>>>> 2.  M302 screen. (along with other M302/3 functions like E-stop etc.).
>>>>> Again would take the "recommend to operator" approach.
>>>>> 3.  AntennaPhysical.  Easy to implement an automated function.  However,
>>>>> one would like to have an operator override capability.  Adding a 'rest'
>>>>> or 'mib' interface would be a possible way to implement this.  Not quite 
>>>>> sure what screen would talk to it, though.
>>>>> _______________________________________________
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>>>>>     
>>>>>           
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-- 
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Hichem Ben Frej - hbenfrej at aoc.nrao.edu

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