EPICS Controls 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  2013  2014  2015  2016  2017  <20182019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  <20182019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: Which record is the best to use?
From: "Mooney, Tim M." <[email protected]>
To: Maren Purves <[email protected]>, "Ivashkevych, Oksana" <[email protected]>, Tech-talk <[email protected]>
Date: Fri, 13 Apr 2018 07:01:47 +0000

Hi Maren,


Yes, you could do that.  The CALC _expression_, and the OOPT field, have complete control over the circumstances under which the output link is executed.  (And note: if the CALC _expression_ value is not also the value you want the output link to write, you can tell the record to write the result of the OCAL _expression_ instead, using the DOPT field.)


Tim Mooney ([email protected]) (630)252-5417
Beamline Controls Group (www.aps.anl.gov)
Advanced Photon Source, Argonne National Lab


From: Maren Purves <[email protected]>
Sent: Thursday, April 12, 2018 10:48:49 PM
To: Mooney, Tim M.; Ivashkevych, Oksana; Tech-talk
Subject: Re: Which record is the best to use?
 
You could put in a counter and break out of that loop after a certain
number of tries?

Maren Purves
East Asian Observatory
(I thought I had sent this earlier but got an error)

On 04/11/18 04:40, Mooney, Tim M. wrote:
> One way to implement a loop is which a calcout record.  The CALC
> _expression_ determines whether or not to loop, and the OOPT field
> specifies the condition in which the output link is executed.  The
> output link should a CA link, otherwise EPICS will break what looks to
> it like an infinite loop.
>
>
> Tim Mooney ([email protected]) (630)252-5417
> Beamline Controls Group (www.aps.anl.gov)
> Advanced Photon Source, Argonne National Lab
>
> ------------------------------------------------------------------------
> *From:* [email protected] <[email protected]> on
> behalf of Ivashkevych, Oksana <[email protected]>
> *Sent:* Wednesday, April 11, 2018 8:21:46 AM
> *To:* Tech-talk
> *Subject:* Which record is the best to use?
>
>
> Hello,
>
> I would like to automate phasing of servomotors in Delta Tau.
>
> 1.      Send phasing command via asyn, wait
>
> 2.      If Phasing successful(bit x is set), ->DONE
>
> 3.      If Phasing error(bit y is set),  do 1 again.
>
>
>
> I would like to do it in the database, and not via sequencer, because it
> will give me a luxury of using a substitution file and repeating the
> same for 9 motors and looks much easier. It would be interesting to see
> how Delta Tau will handle several simultaneous phasing requests.
>
>
>
> Thank you for your advice.
>
>
>
> Oksana
>


Replies:
Re: Which record is the best to use? Ralph Lange
References:
Which record is the best to use? Ivashkevych, Oksana
Re: Which record is the best to use? Mooney, Tim M.
Re: Which record is the best to use? Maren Purves

Navigate by Date:
Prev: Question about the data browser plot tool bar of CSS lzf neu
Next: Re: EPICS Record to SCADA data exchange Ralph Lange
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  <20182019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: Which record is the best to use? Maren Purves
Next: Re: Which record is the best to use? Ralph Lange
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  <20182019  2020  2021  2022  2023  2024 
ANJ, 13 Apr 2018 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·