Experimental Physics and
Industrial Control System

Carl Schumann <[email protected]> · Wed, 20 Aug 2008 14:00:31 -0500

Hi,
The E in EDM stands for extensible as I understand it. There are two
ways that I could think of a display manager(DM) being extensible:

1. extending the widget set

2. extending the set of PVs/data acquisition protocols supported by the DM

My interest is doing the later without having to reimplement a whole new
widget set as well.
We have users (mostly physicists and engineers but not programmers)
doing development with EDM (and EPICS) that are unable to access useful
machine parameters that are currently only available through ACNET.
Here at FNAL we will probably never be an exclusively EPICS
installation, because of the volume of machine parameters that are
instrumented via home-grown ACNET. I would like to extend EDM so that
it can display legacy ACNET machine info in addition to EPICS machine
info. It would appear this would be possible at some level, since it
appears EDM already supports EPICS and CALC PVs. Is it
reasonable/possible to extend EDM to support other "PV"s besides EPICS
and CALC? What is not clear so far to me is how much coupling there is
between the widget set and the PV implementations. Assuming I can
develop an ACNET PV for EDM, would I also need to develop an ACNET
widget set?
Thank you for your time.
Sincerely,
Carl Schumann

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System