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 out-of-date timestamp), I would like to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
<2014>
2015
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
<2014>
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|