PVA OUT Links in EPICS:

[Varuna Crishan Meddage via Tech-talk <tech-talk at aps.anl.gov>]

I have an analog output record which outputs to another analog output record (published by different IOC) as defined below

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record(ao, "PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1") {

    field(OUT, {pva:{"pv":"acq2106_345:4:AO:SLOW_SET:CH:1"}})

}

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Just after IOC is initiated, dbpr query on this PV says it is undefined and severity is invalid.

After assigning a value to this PV, invalid severity disappears.

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epics> dbpr PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1

AMSG:               ASG :               DESC:               DISA: 0             

DISV: 1             NAME: PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1  NAMSG:              

OMOD: 0             OVAL: 0             RBV : 0             RVAL: 0             

SEVR: INVALID       STAT: UDF           TPRO: 0             VAL : 0             

epics> 

epics> 

epics> 

epics> 

epics> dbpf PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1 5

DBF_DOUBLE:         5         

epics> 

epics> 

epics> dbpr PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1

AMSG:               ASG :               DESC:               DISA: 0             

DISV: 1             NAME: PIP2:CTRL_MPS:4:AO:SLOW_SET:CH:1  NAMSG:              

OMOD: 0             OVAL: 5             RBV : 0             RVAL: 5             

SEVR: NO_ALARM      STAT: NO_ALARM      TPRO: 0             VAL : 5  

Is it possible to get rid of this invalid severity even before writing a value to this PV ?

I tried different tricks for example setting field(VAL, "0") and field(PINI, "YES"), but none of them was successful.

Thanks

Varuna Meddage