Experimental Physics and
Industrial Control System

Hi Kevin,

When a soft motor is commanded to move, it is the motor record that
initially set the DMOV to zero; the value of DINP PV is ignored at
this point.  The first time the DINP PV is used is the first status
update after the move is initiated.  If the moving-poll rate of the
real motors is high,

60 Hz in my case

there can be a very narrow window during which the DINP calc must be
done.

Sorry, I don't get it, yet. Can you please describe a bit more detailed 
how it is supposed to behave and in contrast to that what you think 
happens if it fails?

In "soft motor record.db" the DINP field is set to
"$(PREFIX):doneMoving_". How is $(PREFIX):doneMoving_ calculated?

record(calc, "$(PREFIX):doneMoving_") {
   field(CALC, "A && B")
   field(INPA, "$(PREFIX):motorRadPiston.DMOV CP MS")
   field(INPB, "$(PREFIX):doneMovingGate_ NPP MS")
}

record(bo, "$(PREFIX):doneMovingGate_") {
   field(FLNK, "$(PREFIX):doneMoving_")
}

record(calcout, "$(PREFIX):doneMovingCloseGate_") {
   field(CALC, "A")
   field(INPA, "$(PREFIX):motorAngPiston.DMOV CP MS")
   field(OUT, "$(PREFIX):doneMovingGate_ PP MS")
   field(OOPT, "Transition To Non-zero")
   field(DOPT, "Use OCAL")
   field(OCAL, "1")
}

This is inspired by a mail by Tim
(http://www.aps.anl.gov/epics/tech-talk/2008/msg00127.php). I hope I 
implemented it the right way...

Thanks,

Martin