EPICS Controls Argonne National Laboratory

Experimental Physics and
Industrial Control System

1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024  Index 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: Re: OMS 58 and auxiliary outputs
From: David Maden <[email protected]>
To: Rok Sabjan <[email protected]>, "[email protected]" <[email protected]>
Date: Wed, 15 Jan 2003 13:35:59 +0100
Rok Sabjan wrote:
Hello!

I'm dealing with some stepper motor control and would like to use auxiliary outputs of the OMS 58 motor controller card for setting the stepper driver to all windings off mode. Has this been attempted before? I have looked into motor record, but was unable to find any implementation of that functionality.

Do you think this is possible?

If I understand the question correctly, I believe that this is what we are doing as standard with the motor driver subsystem which we have between the OMS58 card and the motors at SLS. These were designed in-house. See:


http://www.sls.psi.ch/beamlines/ege/index.html

for a picture and a link to more information:

In the motor record, we have the following fields defined:

     record (motor, "my_motor") {
           ...
        field (INIT, "@DPM_ON@AN")   <== turn on power monitoring
                                         and turn off power to the
                                         motors.
        field(PREM, ";AF;")     <== turn on  power to the motors.
        field(POST, ";AN;")     <== turn off power to the motors.
           ...
    }

Note that there's a bit of negative logic involved here, i.e. turning "off" the auxiliary signal with "AF" actually turns the drive current on in our setup!

Regards,

David

                               [email protected]
     _/_/_/   _/   _/_/_/     Beamline Control Group, SLS Project
    _/       _/   _/         Paul Scherrer Institute
     _/_/   _/     _/_/     CH-5232 Villigen-PSI
        _/ _/         _/   Tel: +41 56 310 3616
   _/_/_/ _/_/_/ _/_/_/   Fax: +41 56 310 3294


References:
OMS 58 and auxiliary outputs Rok Sabjan

Navigate by Date:
Prev: CA Put Logging bug fixing. Vladis Korobov
Next: Re: OMS 58 and auxiliary outputs Martin L. Smith
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: OMS 58 and auxiliary outputs Rok Sabjan
Next: Re: OMS 58 and auxiliary outputs Martin L. Smith
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  <20032004  2005  2006  2007  2008  2009  2010  2011  2012  2013  2014  2015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 10 Aug 2010 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·