[evla-sw-discuss] Feed heaters

[Bryan Butler]

well, i guess that answers it then for the F317.  the F320s go away eventually. 
    is it possible to have an ostream listener in the M303?

	-bryan


On 12/20/06 14:42, Hichem Ben Frej wrote:
> 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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