Programming a computer control system for materials handling in a spray shop

Development of a control system for suspension conveyors for materials handling in a spray shop.

The software was implemented on a control computer based on the Z-80 microprocessor using Pascal and a multitasking operating system.

• The network control system was comprised of 35 distributed microprocessors serially connected to a master computer.
• The microprocessors controlled switching points, brakes and electromagnetic sensors.
• The microprocessors were programmed in Assembler. The master computer was programmed in Pascal and Assembler.
• I wrote the entire plant control logic, which was implemented on the master computer.
• The programmes were implemented in concurrent Pascal, using multi-tasking re-entrant and recursive programming techniques.
• I proposed and implemented the idea of continuously displaying plant process states on the VDU screen.
• I introduced the idea of accessing process states while the plant was in production.
• I also proposed an automatic computer start-up method, which decreased plant start-up times.

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