Experimental Physics and Industrial Control System
|
I think you could do both of Mark's suggestion at the same time yielding periodically scanned status records that also get scanned immediately when an associated "set" record is written to.
Yep.
Manual on-demand scanning could be implemented with an OPI button that writes to the record's PROC field. Sometimes I have seen different scan rates being applied based (using a seq record) on device status: poll fast when things are "moving", poll slow when things are not.
BTW. This issue is not particular to StreamDevice at all. Any readback from a device that has to be actively polled will act the same way.
Cheers, ~Ralph
- References:
- Stream device - general concept how to use Christian Pauly via Tech-talk
- Re: Stream device - general concept how to use Mark Rivers via Tech-talk
- Re: Stream device - general concept how to use Arnold, Ned D. via Tech-talk
- Navigate by Date:
- Prev:
PowerMaster II device support? DiMonte, Nicholas via Tech-talk
- Next:
RE: Modbus alarms question Mark Rivers via Tech-talk
- 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: Stream device - general concept how to use Arnold, Ned D. via Tech-talk
- Next:
Re: Stream device - general concept how to use Christian Pauly via Tech-talk
- 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
|
ANJ, 16 Jul 2020 |
·
Home
·
News
·
About
·
Base
·
Modules
·
Extensions
·
Distributions
·
Download
·
·
Search
·
EPICS V4
·
IRMIS
·
Talk
·
Bugs
·
Documents
·
Links
·
Licensing
·
|