Experimental Physics and
Industrial Control System

"Allison, Stephanie" <[email protected]> · Fri, 2 Apr 2010 08:34:42 -0700

Hi Jovan,

> I don't know how to pass the local PVs (LOC) to the python script and
> back to EDM.

Use an IOC?

For something like this, I create a waveform record on a soft IOC and populate it from scalar records using some subroutine-type record or sequence.  It seems like a "waste" to add records just for display purposes.  But then I discover that some of these "display-only" records end up being used by other gui's and CA clients (ie, matlab) for their own purposes.   

Stephanie   

> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On Behalf
> Of Jovan Loncar
> Sent: Friday, April 02, 2010 7:57 AM
> To: Tech Talk
> Subject: create arrays in EDM
> 
> Hi all,
> 
> i am new to EDM and i am trying to create an array from different scalar
> (integer) PVs.
> So that i can display all of them on one X-Y Graph. Only the last
> reading is neccessary
> and the resulting X-Y Graph should look like a "historgram" or sound
> equalizer (for a visual
> understanding of what i am trying to accomplish).
> 
> Possibly the result would look something like
> LOC\\my_array:{EPICS\\A_PV, EPICS\\B_PV, EPICS\\C_PV ...}
> The number of scalar PVs can be up to 200 and is constant.
> I am not sure if it is possible and if someone has already tried this i
> would appreciate some help.
> 
> If this is not possible only within EDM, then maybe the way to go is to
> to use some scripts.
> I have used the example for edmFilters with python to change the
> template edl.
> But in that example the write to stdout of the script is used by the
> Embedded Window Widget
> to display new/changed screen.
> I don't know how to pass the local PVs (LOC) to the python script and
> back to EDM.
> 
> Another option could be to create a new widget, for this task.
> I still need to investigate this one, but would not like to reinvent the
> wheel
> in case someone here knows of an existing widget for this kind of operation.
> 
> If anyone has another idea or if i am missing something please point me
> to the
> right direction.
> 
> Thanks in advance for answers.
> Best Regards,
> Jovan

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System