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PLC Validation

PLC Validation

PLC Validation

(OP)
I currently am working on a project to validate the PLC control software on a steam steriliser.  Has anyone got any experience in this?  Where do I start?  Anyone know of any website with sample protocols?  What are the main things I should cover?

RE: PLC Validation

There are no specific procedures that I know of, since testing is a function of the functionality of the software.  However, what you appear to be asking is something akin to Formal Qualification Testing (FQT) and/or Design Verification Testing (DVT).  The IEEE standards on software development may provide some guidelines.

In general, you need to basically run down through your Software Requirements Specification (SRS) and verify that each function is implemented and works to specification.  If there are specific algorithmic functions, these need to be fed real or simulated inputs to see how the software reacts to the inputs and whether its outputs are according to specification.  You might have an Algorithm Description Document (ADD) that shows, mathematically, how your software is supposed to process its inputs and how it generates outputs.

Additionally, you may have a prototype model of the process software in Matlab, in which case you can compare the model to the reality.

TTFN

RE: PLC Validation

(OP)
Thanks for the reply IRstuff.

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