Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
<== Date ==> <== Thread ==>

Subject: Re: motor record: continuously update limit switches
From: "Konrad, Martin" <konrad@frib.msu.edu>
To: Mark Rivers <rivers@cars.uchicago.edu>, "sluiter@aps.anl.gov" <sluiter@aps.anl.gov>, "mooney@aps.anl.gov" <mooney@aps.anl.gov>, "sullivan@aps.anl.gov" <sullivan@aps.anl.gov>
Cc: "tech-talk@aps.anl.gov" <tech-talk@aps.anl.gov>
Date: Fri, 26 Jul 2013 20:07:25 +0000
Hi!

Thanks for you reply, Mark.
> HLS, RHLS, LLS and RLLS only update when you try to move the motor in
> the direction of the offending switch.
>
> However, the MSTA field will update if you write 1 to the STUP
> field.
Unfortunately this seems not to be the case with the PC6K device
support. MSTA seems not to be updated while the motor is stopped. Can
this be considered a bug?
> Is your goal to make the user aware of the limit status by changing
> something in the GUI?
Yes, exactly. Maybe also for a state-machine that implements some sort
of a calibration procedure.
> It would be nice if HLS, RHLS, LLS and RLLS reflected the actual
> limit status.  In fact the motor record documentation is wrong.  For
> HLS and RHLS it says:
>
> " If either of these fields is nonzero, then the motor is at the
> positive-limit switch, where the positive sense is that of the
> user-coordinate system for HLS, and that of the raw (step-number)
> coordinate system for RHLS."
>
> That is not true, it does not reflect the state of the switch.  It
> only reflects the error status if the switch is hit and the user
> tries to move in the direction of that switch.
@Ron/Tim/Joe: Can you fix the documentation with the next release,
please? And while we're at it: The Documentation website says "Last
modified: June 25, 2003" which is most likely wrong as well.

Thank you very much,

Martin


Replies:
RE: motor record: continuously update limit switches Mark Rivers
References:
motor record: continuously update limit switches Konrad, Martin

Navigate by Date:
Prev: CA question with two identical servers Goff, Steven J
Next: RE: motor record: continuously update limit switches Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
Navigate by Thread:
Prev: RE: motor record: continuously update limit switches Mark Rivers
Next: RE: motor record: continuously update limit switches Mark Rivers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  <20132014  2015  2016  2017  2018  2019 
ANJ, 20 Apr 2015 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·