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Structured Development for Real-Time Systems by Paul T. Ward, Stephen J. Mellor

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Appendix B. Bottle Filling System

Implementation Resources Background

The system is to be implemented using a pair of microprocessors. One (the Equipment Control Processor) will perform the closed-loop control functions such as controlling vat level and pH, and will also monitor and operate the mechanical equipment such as the labeler and the bottle release mechanism. The other processor (the User Interface Processor) will accept and process keyboard input from the line operators and the area supervisor, and will produce screen displays for Line Status and Area Status.

There will be a set of interrupt lines between the processors; in ...

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