Depicting PLC control on Process Flow Diagrams
Depicting PLC control on Process Flow Diagrams
(OP)
Is there a good way to show PLC control logic, both analog and discrete, on a PFD? How would one show manually-inputted PLC parameters (e.g., a manually-inputted flow limit)?





RE: Depicting PLC control on Process Flow Diagrams
Or use ControlDraw and add the PLC logic as linked diagrams.
Francis
www.controldraw.co.uk
www.s88control.blogspot.com
RE: Depicting PLC control on Process Flow Diagrams
The P&IDs are what should contain the PLC/DCS logic. Take a look at ISA 5.1 for reference on how to show the PLC logic.
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This is normally the space where people post something insightful.
RE: Depicting PLC control on Process Flow Diagrams
Or use ControlDraw and add the PLC logic as linked diagrams.
Francis
www.controldraw.co.uk
www.s88control.blogspot.com