  The SRS is a 2GeV synchrotron light source with 14 beamlines serving
approximately 34 experimental stations. Control of the major elements of the
beamlines (vacuum pumps, gauges, valves and radiation stops) is the
responsibility of the main SRS Control System. As part of the long-term upgrade
plan for the SRS Control System a large programme of work has been undertaken
to modernize beamline control. This work included: development of Linux based
PC front end computers to interface to the existing CAMAC I/O system,
replacement of the user interface by graphical synoptic diagrams running on
Windows NT PCs, development of an ActiveX control for parameter display/control
and a cache server to reduce loading on the rest of the control system. This
paper describes the major components of the project; the techniques used to
manage the new PCs and discusses some of the problems encountered during
development.
