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  <20142015  2016  2017  2018  2019  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  <20142015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
<== Date ==> <== Thread ==>

Subject: RE: How to tag soft channels as undefined/disconnected
From: "Andrew C. Starritt" <[email protected]>
To: Kellee Summers <[email protected]>, "Lionberger, Carl A." <[email protected]>, "[email protected]" <[email protected]>
Date: Thu, 14 Aug 2014 00:45:39 +0000
Hi Kellee,

   I did something like what you are doing. The PV values are written to by a bash script.
If/when the source data did not exist or was stale I did I wrote 1 to the record's UDF field
which set it invalid.

      # Set undefined.
      #
      caput ${pvname:?}.UDF  1  


where worked for me, i.e. set SEVR to INVALID and STAT to UDF (using base-3.14.12.3)
Regards

Andrew C. Starritt | Principal Controls Engineer | Australian Synchrotron 
p: (03) 8540 4164 | f: (03) 8540 4200
[email protected] | www.synchrotron.org.au
800 Blackburn Road, Clayton, Victoria 3168

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Kellee Summers
Sent: Thursday, 14 August 2014 12:50 AM
To: Lionberger, Carl A.; [email protected]
Subject: Re: How to tag soft channels as undefined/disconnected

This sounds pretty simple and what I'm trying to do.  The problem is I 
don't know how to do this part:  "sets the PV invalid"
How do you do that?  Is that just some kind of timeout on the processing?

Thanks for your help,
Kellee

On 08/13/2014 06:47 AM, Lionberger, Carl A. wrote:
> For a project where I had a python program updating soft PVs, I wrote a timeout device support to use instead of the soft channel device support.  It times out and sets the PV invalid if a new value was not put to it within the timeout period since the last put. The C++ application just wouldn't put the value to the PV if the instrument data was invalid, and then the PV would go invalid without further action.  When valid data became available, the application would put it to the PV and the PV status would go normal again.
>
> Carl
>
> Carl Lionberger
> Instrument Data Acquisition and Controls
> Spallation Neutron Source
> ________________________________________
> From: [email protected] <[email protected]> on behalf of Kellee Summers <[email protected]>
> Sent: Tuesday, August 12, 2014 7:02 PM
> To: [email protected]
> Subject: How to tag soft channels as undefined/disconnected
>
> Hi All,
>
> We have set up an EPICS R3.14.12.4 database of pure software channels
> (on a Linux system) so that we can use the alarm handler. The channel
> values are being driven by a C++ software application that reads our
> instrument data.   When the instrument data is stale (determined by an
> out-of-date timestamp), I would like to
> set the channels to UDF so that the alarm state is INVALID.
>
> The SEVR and STAT alarm fields are non-modifiable.  I tried setting the
> UDF field but it didn't give me a disconnected channel.
>
> Do I need to modify the record processing?
>
> Suggestions?
>
> Thanks



Replies:
Re: How to tag soft channels as undefined/disconnected Kellee Summers
References:
How to tag soft channels as undefined/disconnected Kellee Summers
RE: How to tag soft channels as undefined/disconnected Lionberger, Carl A.
Re: How to tag soft channels as undefined/disconnected Kellee Summers

Navigate by Date:
Prev: Re: Launching CS-Studio BOY screens Hu, Yong
Next: Device Support for VME controller SIS3100 Florian Feldbauer
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  <20142015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
Navigate by Thread:
Prev: Re: How to tag soft channels as undefined/disconnected Kellee Summers
Next: Re: How to tag soft channels as undefined/disconnected Kellee Summers
Index: 1994  1995  1996  1997  1998  1999  2000  2001  2002  2003  2004  2005  2006  2007  2008  2009  2010  2011  2012  2013  <20142015  2016  2017  2018  2019  2020  2021  2022  2023  2024 
ANJ, 17 Dec 2015 Valid HTML 4.01! · Home · News · About · Base · Modules · Extensions · Distributions · Download ·
· Search · EPICS V4 · IRMIS · Talk · Bugs · Documents · Links · Licensing ·