Re: How to configure waveform record to read remote PV via PVAccess in EPICS

[Michael Davidsaver via Tech-talk <tech-talk at aps.anl.gov>]

On 3/25/26 1:54 PM, Varuna Crishan Meddage wrote:

Hi,

I created the following PV

===========================================

record(waveform, "PIP2:CTRL_MPS:acq2106_current")

{

  field(INP, {pva:{pv:"acq2106_347:1:AI:WF:17", "proc":"CPP"}})

  field(FTVL, "DOUBLE")

  field(NELM, "4096")

  field(SCAN, "1 second")

}

===========================================

But it complains that input PV is disconnected.

...

iocdev1$ pvxget acq2106_347:1:AI:WF:17

Is your IOC running with the same PVA configuration (environment variables) as your shell session?

fyi. At the IOC shell, run "pvxsr" to see the effective configuration (after auto address list expansion).

epics> pvxsr
EPICS_PVAS_AUTO_BEACON_ADDR_LIST=NO
EPICS_PVAS_BEACON_ADDR_LIST=192.168.1.255 10.127.127.255
EPICS_PVAS_BROADCAST_PORT=5076
EPICS_PVAS_IGNORE_ADDR_LIST=
EPICS_PVAS_INTF_ADDR_LIST=0.0.0.0
EPICS_PVAS_SERVER_PORT=5075

eg. If I run one instance of softIocPVX with

record(calc, "counter") {

    field(SCAN, "1 second")

    field(CALC, "VAL+1")

}

And a second with

record(longin, "follower") {
    field(INP, {pva:{pv:"counter", "proc":"CP"}})
}

I see that the "follower" record subscribes to the "counter"

epics> dbgf follower  
DBF_LONG:           59 = 0x3b  
epics> dbgf follower  
DBF_LONG:           60 = 0x3c