CPS: Instruction not certified for use in Safety routines

Someone at RA disagrees...


TN 50235: How CPS and COP work
Access Level: TechConnect
https://rockwellautomation.custhelp....ail/a_id/50235


Extract from the attached word document:

When compared to the COP instruction which only performs step 4, you can see there is a tremendous amount of overhead for the CPS instruction

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Of course, that's not to say that you're objectively wrong or they're objectively right. The magnitude of the overhead is subjective and relative to a great number of other factors, and whether we call it "minor", "huge" or "tremendous" doesn't really add much to the discussion. It's just something to be aware of when deciding which instruction is better suited to your particular application.[FONT=&quot]
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