X-RAY RUNS: Apply for Beamtime
2017 Nov 1 - Dec 21
2018 Feb 7 - Apr 3
2018 Proposal/BTR deadline: 12/1/17
2018 Apr 11 - Jun 4
2018 Proposal/BTR deadline: 2/1/18
The CHESS A-Line controls and safety systems have been upgraded to a modern PLC based system.
The old relay and L.E.D. system has been replaced with a hybrid system that mixes software and
relay logic to provide core safety functions along with additional software control, protection
and monitoring. The new system preserves redundant relay chains as the underlying logic for the
system while allowing additional software protections and flexibility. Replacing L.E.D. status
indicators and mechanical switches with a touch screen interface allows for at-a-glance system
overview and control, while being easy to add new features as the system grows.
The A-cave control system also uses a programmable logic controller (PLC) in conjunction with
a touch panel operator interface to control components along the beamline such as turbo pumps and
vacuum gate valves. The advantage of using a PLC is that control and interlocking can be combined
into a flexible and easily maintained system. This flexibility allows for faster implementation of
new features, easier interactions for operators, and enhanced automation of routine processes. The
PLC can also be integrated into EPICS, which allows for enhanced monitoring capabilities and
diagnostics for operations staff.
Submitted by: Eric Edwards and Chris Whiting
CHESS, Cornell University
11/05/2014