Experimental Physics and
Industrial Control System

Ralph Lange <[email protected]> · Tue, 23 Sep 2014 11:47:05 +0200

Hi Michael,

This behavior is expected and correct.

You have to set the PP property on your OUT link to process the

destination after the value has been written.

I do not see any reason why this could depend on the Linux distribution,

though. Probably in one case your target record is local (OUT link needs

PP), in the other case the target record is remote (processing depends

on the PP property of the target field, which is usually true for .VAL

fields).

HTH,
~Ralph

On 23/09/2014 11:11, Michael Ritzert wrote:

Dear all,

I just found this problem on two different Debian machines (testing,
unstable), x86_64. On Scientific Linux (6.5), also x86_64, the problem
does not show up. With softIoc from base 3.14.12.4 for this DB:

record(ao, "VOLT:set")
{
    field(VAL,  "5")
    field(PINI, "1")
}

record(calcout, "VOLT:calc")
{
    field(OOPT, "When Non-zero")
    field(DOPT, "Use OCAL")
    field(OCAL, "A")
    field(CALC, "1")
    field(OUT,  "VOLT:set")
    field(INPA, "VOLT:req CP")
}

record(ao, "VOLT:req")
{
    field(VAL,  "5")
    field(PINI, "1")
}

I see that the time stamp of VOLT:set does not change when writing to
VOLT:req, but the value changes as expected:

TIME: 2014-09-23 18:04:16.464355407     TPRO: 0             TSE: 0
TSEL:CONSTANT       UDF: 0              VAL: 5

TIME: 2014-09-23 18:04:16.464355407     TPRO: 0             TSE: 0
TSEL:CONSTANT       UDF: 0              VAL: 2

TIME: 2014-09-23 18:04:16.464355407     TPRO: 0             TSE: 0
TSEL:CONSTANT       UDF: 0              VAL: 0

after IOC initialization, caput VOLT:req 2, and caput VOLT:req 0
respectively.

The time stamps of VOLT:calc and VOLT:req are updated as expected.

Can anybody reproduce this behavior?

Best regards,
Michael Ritzert

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System