Gayet, P.

Paper	Title	Page
WEP059	Helium Cryoplant Off-line Commissioning and Operator Training: Two Applications of the PROCOS Simulation System at CERN	513
	M. Pezzetti, B. Bradu, P. Gayet, J. Vasseur CERN, Geneva
	The off-line commissioning step, through reliable simulation of physical models, aims to correct and validate control systems before their implementation into real equipments. It prepares and minimizes plant commissioning phase and at the same time validates the efficiency of the new process control logic. This paper describes how different CERN/UNICOS cryogenic control systems have been pre-commissioned off-line, using the CERN cryogenic simulation environment PROCOS. Some examples are reported. Additionally the presented simulation environment will be used for operator training the second part of the paper will presents the simulation platform and the first feedback from the operation crew.
	Poster
THP067	PROCOS: a Real Time Process Simulator Coupled to the Control System	794
	B. Bradu, P. Gayet CERN, Geneva
	The paper presents the simulation results and the feedbacks from users of a real-time simulator coupled to the clone of an actual UNICOS based control system. This simulator have been developed for the large scale cryogenic systems of LHC. In order to respect the real system architecture, the simulator is composed of different simulation tools sharing data through a standard protocol. The modeling of the process makes use of EcosimPro, a commercial simulation software for industrial systems. Within the model each cryogenic component is represented by a set of differential and algebraic equations and the helium properties are taken from a specialized helium library. The control system is simulated with a PLC-simulator running the actual process control logic. These simulation tools are connected to the SCADA system used to operate the cryogenic plant. Thus, the existing control policy and supervision systems can be reused identically in simulation. The work objectives were threefold: first, to provide tools for operators training, second, to check new control strategies before their implementation and third, to improve our knowledge of the behavior of the cryogenic systems.
THD003	UNICOS: An Open Framework	910
	E. Blanco, F. B. Bernard, P. Gayet, H. Milcent CERN, Geneva
	In early 2001 an object collection called UNICOS (Unified Control System) developed at CERN with the objective of building the LHC cryogenics control system was commissioned for the first time. It deployed the controls layers covering the SCADA (Supervisory Control And Data Acquisition) and the PLC (Programmable Logic Controllers) layers. A possibility of re-targeting the system on other kinds of applications and environments was identified. Since then, the framework proposes a reusable environment composed of a set of components for the SCADA part and several solutions for the front end part (i.e. others than PLC). Together with the description of the UNICOS environment, the paper describes a number of very different applications developed at CERN based on the UNICOS methodology: (1) SURVEY, to align the focusing magnets of the LHC located on both sides of the experiments; (2) Quench Protection System, to display and act on the devices used to protect the superconducting elements of the LHC; (3) Powering Interlock Controller, to manage the powering permissions of the electrical circuits making the LHC.