Experimental Physics and
Industrial Control System

"Pearson, Matthew R." <[email protected]> · Wed, 3 Feb 2016 15:15:34 +0000

Hi Phil,

For the IntensityGraph, I set these properties:

PV Name - the waveform PV name
Data Width 
Data Height
X Axis Max and Min
Y Axis Max and Min

For my generic screens I actually have embedded rules in the widget that set the sizes up. They read the required values from the areaDetector stdArray plugin, which produces the waveform. That way I only have to bother with the PV name. 

The error that you mention seems to indicate that you have an embedded script in the widget, copied from an example, which I suspect that you can remove?

In the running OPI you can also right click and select “Show Macros” which might help you figure out any PV name issues. Also, hover over the graph widget and see what the tooltip says.

Also make sure that the max_array_bytes property is set suitably large (in CSS Preferences -> CSS Core -> EPICS). 

Can you see any PVs at all in CSS? Try setting up a simple text monitor on one of the scalar PV values in the stdArrays plugin. If not, then check the other settings in CSS Preferences -> CSS Core -> EPICS.

Cheers,
Matt

Data Acquisition and Control Engineer
Spallation Neutron Source
Oak Ridge National Lab

> On Feb 3, 2016, at 6:36 AM, Phil Atkin <[email protected]> wrote:
> 
> Can anyone get me started with this?  I'm inexperienced with everything: EPICS, areaDetector, CSS, BOY, Java ... you name it.
> 
> My IOC is working and I can display images using the ImageJ plugin.  My "PCPrefix" in that case is "13SIM1:image1:"
> 
> I've followed this post: https://groups.google.com/forum/#!topic/css-boy/-gUYqgHHUag - but no luck.
> 
> Having placed my Intensity Graph widget, how should I set the PV Name property?  What else needs to be set?
> 
> What I'm seeing in the log is the following:
> 2016-01-27 18:36:32 ERROR: Error in ../../BOY Examples/scripts/SetIntensityGraphData.js on IntensityGraph.
> org.mozilla.javascript.WrappedException: Wrapped java.lang.NullPointerException: PV loc://dataSource has no value. (script#5)
> 
> Thanks,
> 
> Phil
> -- 
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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System