Experimental Physics and Industrial Control System
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Hi Pavel, What is the value of the NUSE field? Most of the acalcout record uses NELM for the number of active array elements if NUSE==0, but the array posting code neglects to do this. If NUSE==0, AVAL won't be posted. This will be fixed in 3.2. For completeness, the acalcout record posts AVAL if any array element (in the range [0..NUSE-1]) has a different value than it had the last time AVAL was posted. AVAL is always posted with the attributes DBE_VALUE and DBE_LOG. (MDEL and ADEL do not affect array posting in the acalcout record. They are used only to decide whether the VAL field should be posted, and if so with what attributes.) Tim
From: "Pavel Maslov" <[email protected]> To: "Yong Hu" <[email protected]> Cc: "EPICS Tech Talk" <[email protected]> Sent: Thursday, January 10, 2013 10:02:11 AM Subject: Re: acalcOut
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.
-- Tim Mooney ( [email protected]) (630)252-5417 Software Services Group (www.aps.anl.gov) Advanced Photon Source, Argonne National Lab
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ANJ, 20 Apr 2015 |
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