Experimental Physics and
Industrial Control System

"Barrett \(US\), Patrick E via Tech-talk" <tech-talk at aps.anl.gov> · Wed, 29 Jun 2022 13:35:05 +0000

Thank you, I am able to use that to get it to work.

Patrick

-----Original Message-----
From: Zimoch Dirk (PSI) <dirk.zimoch at psi.ch>
Sent: Wednesday, June 29, 2022 3:41 AM
To: Barrett (US), Patrick E <patrick.e.barrett at boeing.com>; tech-talk at aps.anl.gov
Subject: [EXTERNAL] Re: StreamDevice return state error

EXT email: be mindful of links/attachments.

On Wed, 2022-06-29 at 09:28 +0200, Zimoch Dirk wrote:
> On Wed, 2022-06-29 at 07:25 +0000, Zimoch Dirk (PSI) via Tech-talk wrote:
> > Hi Patrick,
> >
> > The error "Record does not accept input" happens when you send a
> > string (parsed with %s) to a record with an enum VAL like your mbbi,
> > but the string does not match any of the enum strings in the record.
> > As your record only has "STANDBY", "OPERATE" and "SELFTEST", it does not accept the input "MONITOR".
> >
> > Dirk
> >
>
> The mbbi should be in INVALID/CALC alarm state after that.

Except.... that your record is "I/O Intr". Such records get all the available input but process only matching input.
Non-matching input is silently ignored. That is by design how StreamDevice implements I/O Intr.

Instead of %s you can use a more specific input format like "%{STANDBY|OPERATE|SELFTEST|}%*s". This one returns 0,1,2 on the known strings (actually on anything starting with a known string) and 3 on anything else (which is then ignored so that the format does not fail)). Set an alarm for state 3.

readSystemState
{
    in "SYSTEM:STATE %{STANDBY|OPERATE|SELFTEST|}%*s";
    out "%(\$1)s";
}

record(mbbi, "RCV_STATE")
{
    field(DESC, "SYSTEM:STATE P01")
    field(DTYP, "stream")
    field(SCAN, "I/O Intr")
    field(INP,  "@simCmd.proto readSystemState(STATE_RTN) $(PORT) 0")
    field(ZRST, "STANDBY")
    field(ONST, "OPERATE")
    field(TWST, "SELFTEST")
    field(THST, "ERROR")
    field(THSV, "MAJOR")
    field(UNSV, "INVALID")
}

As now StreamDevice returns the index number and not the string, you can even use different Strings in your *ST fields.

>
>
> >
> > On Tue, 2022-06-28 at 16:37 +0000, Barrett (US), Patrick E via Tech-talk wrote:
> > > I am working to simulate a SCPI type device with an IOC.  I am
> > > using I/O Intr records to read in the SCPI and set the state of
> > > the mbbi record.  The IOC should return ERROR if an error occurs,
> > > such as if an invalid state is requested.
> > > I
> > > can see the error message in the IOC when an invalid state is
> > > requested, but do not know how to capture the error in the
> > > protocol file or db setup to send a return string of “ERROR”.
> > >
> > > The error I get is when sending the IOC “SYSTEM:STATE MONITOR” is:
> > > ’… RCV_STATE: Record does not accept input "MONITOR"’
> > >
> > > Proto definition:
> > > readSystemState
> > > {
> > >    in "SYSTEM:STATE %s";
> > >    out "%(\$1)s";
> > > }
> > >
> > > Record definition:
> > > record(mbbi, "RCV_STATE")
> > > {
> > >    field(DESC, "SYSTEM:STATE P01")
> > >    field(DTYP, "stream")
> > >    field(SCAN, "I/O Intr")
> > >    field(INP,  "@simCmd.proto readSystemState(STATE_RTN) $(PORT) 0")
> > >    field(ZRST, "STANDBY")
> > >    field(ZRVL, "0")
> > >    field(ONST, "OPERATE")
> > >    field(ONVL, "1")
> > >    field(TWST, "SELFTEST")
> > >    field(TWVL, "2")
> > >    field(UNSV, "INVALID")
> > > }
> > > record(bi, " STATE_RTN ")
> > > {
> > >    field(DESC, "State Return")
> > >    field(DTYP, "Soft Channel")
> > >    field(SCAN, "Passive")
> > >    field(ZNAM, "OK")
> > >    field(ONAM, "ERROR")
> > >    field(VAL, 0)
> > >    field(PINI, 1)
> > > }
> > > Patrick Barrett
> > > Software Engineer
> > > The Boeing Company
> > >

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System