Introducing fast interlocks in the UNICOS-CPC framework

The CERN UNified Industrial COntrol System framework (UNICOS) with its Continuous Control Package (UNICOS-CPC) is the CERN standard solution for the design and implementation of continuous industrial process control applications. The need of adapting the framework capabilities to the different processes at CERN has brought new challenges. Reacting as fast as possible to an interlock situation to protect equipment is a new requirement which has been introduced in UNICOS-CPC. This paper present the challenges, design and test results of the seamless integration of fast interlocks capabilities in the current UNICOS-CPC package based on conventional PLCs (Programmable Logic Controllers), with a heightened level of flexibility and maturity. The first implementation is employing SIEMENS PLCs but the underlying technique is extensible to the other UNICOS-CPC compliant platforms.