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Recently I've started to use PFS (Process Functional Specification) software packages (from SpecSoft) for computerized SOO (Sequence of Operation) integration with P&ID + PLC I/O definitions & wiring. This package is based on S-88 process model. I have some difficulties to define continious control systems in terms of S-88. Actually I'm need some kind of "light-weighted" model for both continious and batch processes.
For example, according to S-88 there is procedural control model (see S88, part 1, 5.2.1) which is based on hierarchy of procedures->operations->phases.
But there is no operation or phases in a simple temperature control loop. S-88 has no "control loop" concept. So the perfect S-88 chain- "Procedural control utilizes equipment/control modules with their assosiated basic control to achieve process functionality"- cannot be defined for continious processes.
Since PFS software provides S-88 "objects" (procedures, phases, ...}to deal with process/procedural control definitions, I need somehow to "map" continious process terms (which I didn't succeed to define) to S-88 terms.
Any suggestions ?
For example, according to S-88 there is procedural control model (see S88, part 1, 5.2.1) which is based on hierarchy of procedures->operations->phases.
But there is no operation or phases in a simple temperature control loop. S-88 has no "control loop" concept. So the perfect S-88 chain- "Procedural control utilizes equipment/control modules with their assosiated basic control to achieve process functionality"- cannot be defined for continious processes.
Since PFS software provides S-88 "objects" (procedures, phases, ...}to deal with process/procedural control definitions, I need somehow to "map" continious process terms (which I didn't succeed to define) to S-88 terms.
Any suggestions ?