By Edited by: Javier Silvestre-Blanes
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Extra resources for Factory Automation
Such decentralized systems, therefore, work at a different abstraction level; instead of concrete functionality, rules for coordination are established that then, for example, are worked off by an agent framework in the form of auctions or other mechanisms. Much further work has to be done before such systems are ready for the market. The actual implementation of agent platforms, for instance, are widely based on developments in the university environment and must be adapted to the industrial application, particularly in the automation environment, or may even need to be newly developed.
Task Distribution/Automation Pyramid: The hierarchical structure of the automation pyramid has the objective of being able to manage the complexity of the overall system. This is obtained with the described approach by stronger functionally and modularly oriented structuring. Now each module integrates the needed automation functionalities for several automation levels. Decisions by the previous control level are shifting toward the field level, which means that decisions are made closer to the process location of activities.
Because of the wide spreading of PLCs and decentralised peripherals, the ranges between devices may vary from a few meters up to some hundreds of meters. The process data of a whole plant is exchanged via the field bus system. In this conjunction the amount of process data of decentralised periph- 32 Factory Automation erals may vary between < 10 Bytes…> 100 Bytes. Hence, the bandwidth and data rates are of major importance. The size of the actual data packets depends on the structure of the field bus system and whether it uses multi-slave or single-slave frames.
Factory Automation by Edited by: Javier Silvestre-Blanes