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APPLYING INDUSTRIAL SOLUTIONS TO THE CONTROL OF HEP EXPERIMENTS

An increasing number of industrial systems are now using PLCs (Programmable Logical Controllers) and SCADA systems (Supervisory Control And Data Acquisition systems) for process control. These technologies have been used at CERN in the L3 Muon controls project[1] and the NA48 experiment[2]. Under the auspices of JCOP[3], the control systems of B1GCS, the ATLAS-TRT[4] and the ALICE-HMPID[5] have all used the above off the shelf technologies plus OPC (OLE for Process Control) and the PROFIBUS fieldbus. These latter control systems include only a small number of devices, but nevertheless they demonstrate all of the layers of a complete system. In this paper a synthesis will be made of the experience gained and conclusions drawn as to the possible use of these technologies for the CERN LHC detector controls.