Experimental Physics and
Industrial Control System

Gerrit Kühn via Tech-talk <tech-talk at aps.anl.gov> · Wed, 22 Nov 2023 15:33:15 +0100

Am Wed, 22 Nov 2023 11:44:03 +0100
schrieb Ralph Lange via Tech-talk <tech-talk at aps.anl.gov>:

> So my description was biased. Yep, that happens.

But it was perfectly reasonable, all fine. :)

> Small database is a good approach for your size of problem. On the same
> IOC is good, as you don't have to handle disconnects.

I guess I still fail to understand how even the simple things work. I have
made the following for testing now:

---
record (calcout, "$(CHAN)_DUTY_CYC") {
  field (DESC, "duty cycled output")
  field (VAL,  "10") # 1st cycle time
  field (INPA, "10") # cycle time
  field (CALC, "VAL-1")
  field (OUT, "$(CHAN)_DUTY_TEST")
  field (OOPT, "Transition To Zero")
  field (SCAN, "1 second")
}

record (ao, "$(CHAN)_DUTY_TEST") {
  field (VAL, "11")
}
---

The idea was to have the first channel count down seconds from a given
value and then write out to a diffreent channel and make that one process.
The countdown works as expected, I can follow it with camonitor. However,
it looks like the OOPT is never hit even though the counter goes below
zero. The second channel never changes and stays at the default value "11",
it looks like it is never written to. What am I doing wrong?

cu
  Gerrit

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System