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| <== Date ==> | <== Thread ==> |
|---|
| Subject: | Re: FLNK doesn't process |
| From: | William Kirstaedter via Tech-talk <tech-talk at aps.anl.gov> |
| To: | tech-talk at aps.anl.gov |
| Date: | Tue, 18 Jan 2022 12:06:05 +0100 |
Hi,
Im hijacking this Thread because I have a similar problem but the suggested solution is not working.
we have the following db:
record(stringin, "$(P):$(R):getter"){
field(DESC, "$(DESC) raw answer")
field(DTYP, "stream")
field(INP, "@maxigauge.proto getSensorValue($(CHA))
$(PORT)")
field(SCAN, "1 second")
field(FLNK, "$(P):$(R):Status.PROC CA")
}
record(scalcout, "$(P):$(R):Status"){
field(DESC, "$(DESC)")
field(INAA, "$(P):$(R):getter")
field(CALC, "SSCANF(AA, \"%d%*\")")
field(FLNK, "$(P):$(R):Pressure.PROC CA")
}
record(scalcout, "$(P):$(R):Pressure"){
field(DESC, "$(DESC)")
field(INAA, "$(P):$(R):getter")
field(CALC, "SSCANF(AA, \"%*2c%E\")")
field(PREC, "15")
field(EGU, "mbar")
field(ADEL, $(ADEL))
field(MDEL, $(MDEL))
}
this ran fine until recently.
we dont know whats wrong now...
(original code was without ".PROC CA" and with PREC "12")
the problem is that the :getter PV continiously provides new values, while the :Status and :Pressure PVs slow down and stop updating when the Vacuum reaches Pressures in the Range <=1.0E-9.
>= 1.0E-7 its updating fast, around 8.0E-8 its only every
minute or so and below it basically stops.
can anybody tell me why this is happening?
I first thought it was the unsufficient PREC but appearantly it isnt. :(
Thanks in Advance,
William
|
|
| William Kirstaedter (PP&B) | Fritz-Haber-Institut der MPG |
| Faradayweg 4-6 | 14195 Berlin |
| Tel: 030 8413 5405 | Mail: kirstaedter at fhi-berlin.mpg.de |
That worked. Thanks!
On Jan 14, 2022, at 12:44 PM, Hu, Yong <yhu at bnl.gov> wrote:
Change this line:field (FLNK, "$(P):current1.PROC")
to:field (FLNK, "$(P):current1.PROC CA")
From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Randall Cayford via Tech-talk <tech-talk at aps.anl.gov>
Date: Friday, January 14, 2022 at 3:18 PM
To: Gofron, Kazimierz via Tech-talk <tech-talk at aps.anl.gov>
Subject: FLNK doesn't processI have a periodic scanned PV which I occasionally set. However, when I set it, I can’t read the updated value until the periodic scan happens. I would like the PV value to update as soon as it’s set. I thought that was what was supposed to happen with FLNK but it doesn’t seem to.
My db has:
record (ai, "$(P):current1")
{
field (DTYP, "stream")
field (INP, "@thorlab.proto getcurrentch(1) $(BUS)")
field (SCAN, "10 second")
}
record (ao, "$(P):setcurrent1")
{
field (DTYP, "stream")
field (OUT, "@thorlab.proto setcurrentch(1) $(BUS)")
field (FLNK, "$(P):current1.PROC")
field (SCAN, "Passive")
}
"caput setcurrent1 10" works but it takes whatever is left of the 10 second scan period before current1 changes.
“caput current1.PROC 1” immediately updates the value in current1.
I tried field (FLNK, "$(P):current1”) but that doesn’t process either.
What’s the trick for getting a periodic scan PV to process within a forward link? Or is there some other way I’m supposed to do this?
Thanks.
Randall
LBNL