Experimental Physics and
Industrial Control System

Steve Lewis <[email protected]> · Fri, 6 Mar 2009 10:56:38 -0800

If you mean, communicating over the serial line, yes we have at LCLS,

using streamdevice. If you like, I can send you:

streamdevice protocol file
database to go with it
edm screen files

We use the identical stuff for the Varian 701, 1001, and V81.

Note that we have 3x V81, 2x 301, 2x 701, 2x 1001 but of the 9 units,

only the 3x V81 and one of the 301 communicate reliably. The other 6

simply stop communicating within 20-60 minutes; only a power cycle

recovers it. Since we use a PLC connected to the voltage signals for

critical control and monitoring, we can survive without damage. I

have greatly increased all the time-delays to account for

manufacturing differences, to no avail. I suspect that the firmware

is bad.

At 10:23 AM -0800 2009/03/06, Dave Reid wrote:

Has anyone interfaced the Varian 301-AG turbo pump controllers to EPICS?

Thanks...

dave