Components Close to the Process

This part of the computer is the basis of the PES. The fundamental automatized functions are carried out here  

The objective of monitoring is to identify disturbances or dangerous operational states as soon as possible. Reactions of the system can then be 

The control of operational states is an important task of the PES, especially for continuous processes. Software components carry out this task. 

Discontinuous production plants need repetitive procedures. These have to be controlled using pre-programmed function blocks, e.g. 

Interlocks which are often required for safety reasons can be implemented in the PES without problems and virtually no additional requirements of equipment. They are realized by fixed programs, which cannot be modified by the operators. In conventional plants with practically independent control loops the interlock function requires additional devices, e.g. relays, to be installed. 

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