Description
control philosophy and automation, optimization of operating parameters, Man Machine Interface (SCADA), reliability of industrial PLC (operating system issues …)
Dr
Philippe GAYET
(CERN)
24/09/2008, 13:30
CONTROL
The LHC Cryogenic control system launched in 1999 followed a maturation process to reach the present layout. This evolution led by technical and operational issues will be reviewed in the presentation together with the initial operational requirements.
We will present the current operational tools such as control infrastucture monitoring, access control principle, process simulation......
Dr
Paulo Gomes
(CERN)
24/09/2008, 14:00
CONTROL
The cryogenics process automation of each of the 8 LHC sectors is based on 2 Siemens-S7® Programmable Logic Controllers (PLC), each running 250 closed control loops, 300-500 alarms and interlocks, and the process phase sequencer.
Distributed along the LHC circumference, 15 000 cryogenic sensors and actuators are accessed through industrial field networks (Profibus® and WorldFIP®), running...
Mr
Christoph Balle
(CERN)
24/09/2008, 14:30
CONTROL
The cryogenic instrumentation of the LHC-machine includes 15000 sensors and actuators. In the first phase of the hardware commissioning of the accelerator the correct functioning of the measuring channels was checked, while in the second phase the operation-team did a fine-tuning of the cryogenic system based on the acquired measurements. For this purpose and when running the machine in the...
Mr
Antonio Tovar-Gonzalez
(CERN)
24/09/2008, 15:30
CONTROL
Several tools have been developed to assist on the maintenance and diagnostics of the LHC control hardware. These tools run independently of the control infrastructure, do not require any particular computer configuration and are quite fast to load and run.
Two real-time tools based on TCP/IP communication between a PC and Siemens PLCs are implemented:
- PLCdiag: shows the status of all...
Mr
Marco Pezzetti
(CERN)
24/09/2008, 16:00
CONTROL
The cryogenic infrastructure at CERN was originated in the 1960s by bubble chambers and the associated superconducting solenoids. Since then, complex cryoplants have been installed to provide cooling power from 400 W to 18 kW at 4.5 K, requiring high technical capabilities from the control system. The LHC cryogenics has recently adopted the CERN standard control framework UNICOS in order to...
