Experimental Physics and
Industrial Control System

For the record, I’ll put a nice answer here that I got from James Larson.

‘At the end of your exec statement 

direct the output, >,  to /dev/null .  It won’t show up on the ioc .’

I tried that and it works a treat.

In the protocol file:

commsFail {

  #exec 'echo "comms fail on \$0"'; #Turn this off in production

  exec 'dbpf \$1:\$4 "Comms error"> /dev/null';  #/dev/null makes it silent

}

 

readCurrent{

…. Usual out and in stuff, then an exception handler for timeout

              @replytimeout{commsFail;} #comms is down

 

}

 

And in the database file:

….
#COMMSFAIL is the record to write to on a replytimeout

  field(INP, "@$(DEVICE).proto readCurrents($(P)$(R),ITIME_MON,OVR_STS,COMMSFAIL) $(PORT) 0")

…..

 

Thanks James.