Re: acalcOut

[Pavel Maslov <pavel.masloff@gmail.com>]

Hi Yong,

You are right! $(P)$(R)WF1 does get processed. And I do see the waveform on the chart (.AVAL field), it is not updated on the chart . Rather, I have to manually update the OPI hitting F5. The wf1 record is a waveform record and strangely enough it gets updated on the XY plot. I just thought it's the AVAL field of the aCalcOut record that has no monitors.

>> Does it mean: evaluate the _expression_ CC*5/128*A-B, store the result in the input array AA, and set the AVAL field to AA?

Yes.

On Thu, Jan 10, 2013 at 7:02 PM, Hu, Yong <yhu@bnl.gov> wrote:

Hi Pavel,

 

Firstly, we can’t see how the record "$(P)$(R)WF1 gets processed. Is there any forward link to this record? for instance,  

 

record(… ,  "$(P)$(R)wf1") {

…

field(FLNK, "$(P)$(R)WF1")

}

 

If no, you may add CP or CPP in INPA, INPB, INCC,  such as field(INCC, "$(P)$(R)wf1 CP").

 

Secondly, you may set "$(P)$(R)WF1.MDEL to -1, which means the monitor is triggered whenever the record is scanned. Then, camonitor “"$(P)$(R)WF1”. But I’m not sure if this works for the acalcout record.

 

Lastly, I’m not quite sure if you used the "Store" operator correctly for "AA:=CC*5/128*A-B;AA". Does it mean: evaluate the _expression_ CC*5/128*A-B, store the result in the input array AA, and set the AVAL field to AA?

 

Yong

 

 

From: tech-talk-bounces@aps.anl.gov [mailto:tech-talk-bounces@aps.anl.gov] On Behalf Of Pavel Maslov
Sent: Thursday, January 10, 2013 2:05 AM
To: EPICS Tech Talk
Subject: acalcOut

 

Hello,

 

I am experiencing some difficulties with this record type. 

 

record(acalcout, "$(P)$(R)WF1") {

  field(NELM, "2500")

  field(INPA, "$(P)$(R)setY1:RBV")

  field(INPB, "$(P)$(R)ch1pos:RBV")

  field(INCC, "$(P)$(R)wf1")

  field(CALC, "AA:=CC*5/128*A-B;AA")

}

 

I would like to plot an array in CSS 3.1.4. So I'm using an XY graph widget with the Y PV parameter pointed to $(P)$(R)WF1.AVAL.

However it does not put a monitor on the AVAL field. So the plot is not being updated every time the calculation is made.

 

Any suggestions will be much appreciated.

 

--
Best regards,


Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01

--
Best regards,


Pavel Maslov, MS
Controls Engineer at Pulsed power Lab
Efremov Institute for Electro-Physical Apparatus
St. Petersburg, Russia

Mobile: +7 (951) 672 22 19
Landline: +7 (812) 461 01 01