Experimental Physics and
Industrial Control System

Marty Kraimer <[email protected]> · Mon, 17 Dec 2001 07:50:29 -0600

Benjamin Franksen wrote:
> 
> Hello all,
> 
> the Record Reference Manual states that UDF field may be modified and
> even is PP. However, whenever I put some value (1) to UDF field of a
> passive soft ao record (in order to indicate that the record's value is
> undefined now), the record's status / severity do not become UDF_ALARM,
> INVALID_ALARM but remain whatever they are. Subsequent queries of the
> UDF field give the value 0 insted of 1, although no writes to the VAL
> field happen in between.
> 
> Using a dbLink with PP property gives the same results.
> 
> Looking at aoRecord.c and even dbAccess.c, I found no reason for this.
> 
> What am I missing?

This should work. I tried it on soft records and it works just fine.

The test database is

record(ao,"mrkjunk")
{
}
record(ao,"mrkjunk1")
{
    field(OUT,"mrkjunk.UDF PP")
}

The test is
epics> dbpr "mrkjunk"
ASG:                DESC:               DISA: 0             DISP: 0             
DISV: 1             NAME: mrkjunk       OMOD: 0             OVAL: 1             
RBV: 0              RVAL: 1             SEVR: NO_ALARM      STAT: NO_ALARM      
TPRO: 0             VAL: 1              
epics> dbpf "mrkjunk1","1"
DBR_DOUBLE:         1                   
epics> dbpr "mrkjunk"
ASG:                DESC:               DISA: 0             DISP: 0             
DISV: 1             NAME: mrkjunk       OMOD: 0             OVAL: 1             
RBV: 0              RVAL: 1             SEVR: INVALID       STAT: UDF           
TPRO: 0             VAL: 1              

Question. What device support is attached to your ao record?
Note that record support only checks the ufd field after it calls device
support.
Does your device support set ufd 0?

Marty Kraimer

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System