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<== Date ==> <== Thread ==>

Subject: caQtDM questions
From: "Baily, Scott A" <sbaily@lanl.gov>
To: EPICS Tech-Talk <tech-talk@aps.anl.gov>
Date: Thu, 24 May 2018 16:35:54 +0000

I’ve been looking into caQtDM (I’ve used it for a few small projects already).  Some questions have come up, that don’t seem to be mentioned in the manual.

 

Is there a way for the waterfall plot to plot multiple scalar channels or only a single channel? I couldn’t seem to multiple channels to work, but I don’t know if it is supposed to. Could one construct a vector from several scalars using a soft variable?

 

Is there any documentation on PV specifications?

Soft pv’s appear to be an option, but I don’t see how to create them.  We have some PVs with {curly braces in their name (i.e., {}) caQtDM use these for specifying JSON strings to set the display rate.

If there a way to escape this or otherwise enclose it so that the entire thing can be considered part of the channel name?

EDM uses prefixes: EPICS\ for epics PVs (this is the default, but specifying this can work around parsing issues), LOC\ for local PVs, and CALC\ for calculations.

 

--

correspondence

--

Scott Baily

AOT-IC, MS H820

Los Alamos National Laboratory

Los Alamos, NM 87545

ph: (505) 606-2260

 


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