Independence Day Independence Day Basing equipment modules within controllers saves time and

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Independence Day Independence Day Basing equipment modules within controllers saves time and Powered By Docstoc
					Independence Day
Basing equipment modules within controllers
saves time and money
By J. Gordon Roney and Andrew Blankenship




               N        estled near the foothills of the Blue Ridge Moun-
               
				
DOCUMENT INFO
Description: The three main requirements for the implementation of the process control system were: * The operation of the production process, via the process control system, should support direct operator interaction and a batch application manager when installed. * Equipment modules and equipment module control strategies, which have already been qualified and implemented, should not require a re-qualification after they install the batch application manager. * The automation strategy should support the automation of new units reusing as much existing work as possible. Lessons learned Outside of the obvious time and cost savings gained via the reuse of equipment models and the operational benefits of having them based in a controller, additional lessons came about: * Most noticeable is equipment module templates should use a generic name. In practice, it has been useful to have operators manually execute equipment module logic, catch control logic obstacles before recipe implementation, and address them. * Having equipment module logic within the controller has allowed the flexibility to use equipment modules to recover from a batch application manager failure. * Recipe development simplification.
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