Experimental Physics and
Industrial Control System

Andy Foster <[email protected]> · Tue, 14 Jul 2009 00:35:22 +0100 (BST)

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
>
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>  Sitz der Gesellschaft: Darmstadt
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>
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>
>
>

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System