Hi,
I’m wondering why it’s convention that the ai record doesn’t use its convert function when using some types of device support routines. The analog value read function should return status=2 according to the IOC developers guide, and this causes it to not do any LINR type conversion on the VAL field.
I’m wondering why I can’t do this:
record(ai, "$(S):SE:CH1:PVRaw")
{
field(DESC, "Process Variable CH1")
field(DTYP, "asynFloat64")
field(INP, "@asyn(n1,0,1)")
field(SCAN, "I/O Intr")
field(LINR, “SLOPE”)
field(ESLO, “0.1”)
}
whatever the device support routine passes to the ai record is what I get in VAL. So to do slope conversions I have to pass it to another ai record using soft channel device support.
Although, I’ve found that using asynInt32 support does return 0 to the record support, causing the conversion to happen to VAL. I believe ai support in streamDevice does the same.
Cheers,
Matt
Spallation Neutron Source
ORNL
- Replies:
- Re: ai record doesn't do convert for floats? nick.rees
- Re: ai record doesn't do convert for floats? Andrew Johnson
- Navigate by Date:
- Prev:
Re: "security audit" of EPICS / Channel Access? J. Lewis Muir
- Next:
Re: ai record doesn't do convert for floats? nick.rees
- 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: *****SPAM*****makeBaseApp.pl Error J. Lewis Muir
- Next:
Re: ai record doesn't do convert for floats? nick.rees
- 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
|