Speaker
Frank Hartmann
(Institut fuer Experimentelle Kernphysik)
Description
Tracker Safety System TSS and Tracker Control System TCS is a two pillar
system, where TSS ensures independently the safety with a large PLC
(Programmable Logical Controller) system, while TCS controls 2000 power
supplies for silicon module low and high voltage power and 100 low voltage
control power supplies. Detector interdependencies of control, low and high
voltages are handled, as well as fast ramp downs in case of higher than
allowed temperatures or currents in the detector, experimental cavern
problems, etc. All this is ensured by evaluating 10 4 power supply
parameters, 103 information from Tracker Safety System via the Siemens
S7 driver and 10 5 information from the DCUs situated on all front hybrids
and control units CCUs, transmitted via SOAP from DAQ. The software
system is realized in a hierarchical structure starting on the top nodes with
TRACKER, sub detectors passing commands downwards to nodes like Sector,
Cooling Loop, Control Group and finally Power Groups, error states are
reported upwards. The heart of the TCS is composed out of an industrial
SCADA program (Supervisory Control And Data Acquisition) PVSS (Prozess-
visualisierungs- und Steuerungssystem from ETM Austria) together with a
Finite State Machine written in SMI++, a derivate of the former DELPHI
control software; thus using the standard control software framework for all
LHC experiments.
Author
Frank Hartmann
(Institut fuer Experimentelle Kernphysik)
