Subject: Re: [sdss3-25mlog 927] 2.5m obslog 20121113 (MJD 56245)
From: Dan Long
Date: Wed, 14 Nov 2012 08:55:32 -0700
Hi John,
   Just saw your note.  I did a quick test a little while ago.  The =
results show the TCC knows the correct state of the stop buttons with =
less than a 1 second delay.  If I had an "axis status" cued up in telrun =
and hit return as soon as I released the stop button, I could catch it =
still saying a button was in, but in the time it took to up-arrow and =
return, the status changed to reflect the pulled stop button. =20
   If there is a longer duration of incorrect status seen by sop, could =
it be looking at old data?  The fact that the first gotoField fails and =
the second one succeeds regardless of the delay, would seem to indicate =
that some parameter is a step behind.  Let me know if there is some test =
you would like me to try, to help sort this out.
			Cheers,
			   Dan
On Nov 14, 2012, at 8:30 AM, John K. Parejko wrote:
> Hello Dan,
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> If you are going to test this today, could you please send me a note a =
bit before hand, so I can monitor/listen in?
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> We need to check how quickly the MCP and TCC both respond, including =
the exact bits that get set in the MCP/PLC. The observers did a test =
with gotoField last night, and found a much longer delay than I think =
should be occurring, but it is unclear where said delay is coming from.
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> Thanks,
> John
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> On 14Nov 2012, at 07:30, asimmons@apo.nmsu.edu wrote:
>> We tested the delay between removing the stop button at the telescope =
and
>> issuing the gotoField command. We waited 2 seconds, 5 seconds, 10 =
seconds, and
>> 15 seconds during the first few cartridges of the night and found =
that the
>> gotoField command failed to initialize the axes on its own during all =
of these
>> attempts. One such error message can be found in the problem section. =
We have
>> not had this problem in the past, so something must have changed?
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> --
> *************************
> John Parejko
> john.parejko@yale.edu
> http://www.astro.yale.edu/~jp727/
> 203 432-9759
> JWG 465
> Department of Physics
> Yale University
> New Haven, CT
> **************************
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