Set Point Handling

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Thread Starter

nareshkattait

In case of Safety analogue signal, set point or threshold handling should be greater than or greater than equal to.

For example, AI with 0-100 range, High high set point is 90, i need to generate alarm on >=90 or >90. Please clarify

Is there any IEC or any international standard for this query?

Many thanks in advance.
 
Would depend on the application, if this is a limit for a process shutdown signal used in a 1oo2 or similar config for a specific application, then the end user would specify the limitations as being > or >=, you mention an alarm and threshold warnings - if this is purely for indication then, as far as I know, there is no specific requirement and would be end user configurable.
 
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