Experimental Physics and
Industrial Control System

"Allison, Stephanie" <[email protected]> · Mon, 13 Jul 2009 16:46:21 -0700

Hi Andy,

Peter didn't provide the full dbpr of the AO record (unfortunate) but assuming he has ESLO=1.0 (default), because he's using raw soft support and he has LINR set to LINEAR, RVAL is getting set to 200.

I tested his database on 3.14.8.2 (setting the sub to a calc) and saw D set to 200 as it should be.  I wonder if his subroutine function is doing something bad like overwriting some record fields. 

Stephanie Allison

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf
> Of Andy Foster
> Sent: Monday, July 13, 2009 4:35 PM
> To: Dr. Peter Zumbruch
> Cc: Epics Questions
> Subject: Re: sub routine record doesn't get value via INPD
> 
> 
> Hi Peter,
> 
> The "dbpf HAD:RPC:S1:M0:C9:ToTL 200" is putting 200 into
> the VAL field of the AO record: "HAD:RPC:S1:M0:C9:ToTL"
> rather than the RVAL field. Thus, the RVAL field remains at 0.0.
> 
> The OUT link from the AO record gets processed as a result of
> writing to the AO record:
> 
> field(OUT, "HAD:RPC:S1:M0:C9:stToTL")
> 
> This link causes the "200" to be placed in the VAL field of
> the sub record: "HAD:RPC:S1:M0:C9:stToTL".
> 
> The sub record INPD field is looking at the RVAL field of
> the AO field which is still at 0.0.
> 
> Cheers,
> 
> Andy
> 
> 
> 
> On Mon, 13 Jul 2009, Dr. Peter Zumbruch wrote:
> 
> > Hi all,
> > I have the following problem (EPICS 3.14.10 / Debian 4.0)
> > with this tiny database (minimized to my problem) .
> > Why don't I see the Value/Raw Value of "HAD:RPC:S1:M0:C9:ToTL" at the
> > input D of the sub record "HAD:RPC:S1:M0:C9:stToTL", which I try to
> > access at c-code.
> >
> > 1) The ingredients:
> > > record(ao, HAD:RPC:S1:M0:C9:ToTL) {
> > >   field(DESC, "0 0 0 2")
> > >   field(DTYP, "Raw Soft Channel")
> > >   field(FLNK, "HAD:RPC:S1:M0:C9:stToTL")
> > >   field(OUT, "HAD:RPC:S1:M0:C9:stToTL")
> > >   field(EOFF, "0")
> > >   field(LOPR, "0")
> > >   field(HOPR, "199")
> > >   field(DRVH, "250")
> > >   field(DRVL, "0")
> > >   field(LINR, "LINEAR")
> > >   field(OMSL, "supervisory")
> > > }
> > >
> > > record(sub, HAD:RPC:S1:M0:C9:stToTL) {
> > >   field(DESC, "store 0 0 0 2")
> > >   field(INAM, "mySubInit")
> > >   field(SNAM, "myStoreFcn")
> > >   field(INPA, "0")
> > >   field(INPB, "0")
> > >   field(INPC, "2")
> > >   field(INPD, "HAD:RPC:S1:M0:C9:ToTL.RVAL")
> > >   field(INPE, "0")
> > > }
> > The referenced C-Code:
> > > static long myStoreFcn(subRecord *precord)
> > > {
> > >   ...
> > >   short thr;
> > >   ...
> > >   thr = precord->d;
> > >   ...
> > >
> > >   printf( "Record %s called myStoreFcn(%p), thr %d, precord->d %f\n",
> > >            precord->name, (void*) precord, thr, precord->d);
> > >   ...
> > >   return(0);
> > > }
> > > ...
> > > epicsRegisterFunction(myStoreFcn);
> > > ...
> > 2.) The test: (caput / dbpf)
> >
> > > epics> dbgf HAD:RPC:S1:M0:C9:ToTL
> > > DBR_DOUBLE:         0
> > >
> > > epics> dbpf HAD:RPC:S1:M0:C9:ToTL 200
> > > Record HAD:RPC:S1:M0:C9:stToTL called myStoreFcn(0x80577b0), thr 0,
> > > precord->d 0.000000
> > > DBR_DOUBLE:         200
> > >
> > > epics>dbpr HAD:RPC:S1:M0:C9:stToTL
> > > A: 0                ASG:                B: 0                C: 2
> > > D: 0                DESC: store 0 0 0 2 DISA: 0             DISP: 0
> > > DISV: 1             E: 0                F: 0                G: 0
> > > H: 0                I: 0                J: 0                K: 0
> > > L: 0                NAME: HAD:RPC:S1:M0:C9:stToTL           SEVR: NO_ALARM
> > > STAT: NO_ALARM      TPRO: 0             VAL: 200
> > 3. ) The (stupid) question: Why don't I get the value of
> > HAD:RPC:S1:M0:C9:ToTL at D? At VAL I see it.
> >
> > Thanks  for any explanation.
> >
> > Peter
> >
> > --
> >  Dr. rer. nat. Peter W. Zumbruch
> >  EE - department / Controls group / GSI
> >  E-Mail: P.Zumbruch_at_gsi.de
> >  Tel: +49-(6159)-71-1435 / Fax: +49-(6159)-71-2986
> >
> >  GSI Helmholtzzentrum für Schwerionenforschung GmbH
> >  Planckstraße 1 / D-64291 Darmstadt / www.gsi.de
> >
> >  Gesellschaft mit beschränkter Haftung
> >  Sitz der Gesellschaft: Darmstadt
> >  Handelsregister: Amtsgericht Darmstadt, HRB 1528
> >
> >  Geschäftsführung: Professor Dr. Horst Stöcker, Christiane Neumann
> >  Vorsitzende des Aufsichtsrates: Dr. Beatrix Vierkorn-Rudolph,
> >  Stellvertreter: Ministerialdirigent Dr. Rolf Bernhardt
> >
> >
> >
> 
> 

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System