EQUIPMENT BASED CONTROL SYSTEM STRUCTURES FOR COMPLEX AND INTEGRATED SYSTEMS INTENTION AND INDUSTRIAL APPLICATION EXAMPLE

The article describes the approach and the implementation of an equipment based control strategy. Based on a view of subsystems in a production, process or a single machine the control system has to abstract the subunits in an object orientated manner on their methods and properties. The base subunits will run as separated state machines (either on centralized or decentralized control devices) representing themselves to the next control hierarchy level only by said methods and properties. These base subunits form functional subsystems in the same way.Advantages are easy replacement of different base units with the same functionality to the next hierarchy level, high efficiency in construction kit engineering of systems, easy integration of systems to vertical integration attempts – especially in the field of networking and data concentration.The challenge is the implementation on standard industrial PLC systems with a standard industrial EN 61131 like programming language.The example demonstrates the implementation in the most modern test stand for heat meters for the famous German PTB institute, a system with about 1000 physical I/O and measurement points.