Experimental Physics and
Industrial Control System

Ryan Slominski <[email protected]> · Fri, 30 Sep 2016 09:11:28 -0400 (EDT)

Jonathan,
   We've got a prototype web application that reads EDL files and generates a screen on the web.  It uses web sockets to connect to EPICS and draws the widgets mostly with SVG.   The intended use cases are for hall personnel (experimental end stations), site guards in their outposts, and upper management in their office - all whom like to monitor control system screens (read-only), but which are all located on non-control system networks and do not have the environment to easily run our control room screens.   Not sure how far along others are, but what we've got is workable for select screens (haven't gotten around to all widgets yet), and not in production yet - just recently added connection monitoring with automatic reconnect.  

To handle the issue of fonts varying based on platform (example: Helvetica usually is represented with Arial on Windows) we use JavaScript to evaluate the page after it loads and any fonts that overflow their bounding boxes are automatically scaled down to fit.   

The server is Java's GlassFish 4.1.1 and it uses CAJ/JCA wrapped around a custom library providing channel management.

Ryan Slominski
Jefferson Lab
Newport News VA

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System