valueIsMin

Short summary

This assertion method checks if the current value is greater than or equal to the minimum value

Attention: Any comparsion to NaN is FALSE that means if currentValue OR minimumValue is NaN then is the assertion false. For details check IEEE 754_ and the truth table below.

Attention: Every number is smaller than infinity except infinity, it's equal. Every number is greater than -infinity except -infinity, it's equal. For details check IEEE 754 and the truth table below.

truth table for special values

+----------------------+----------------------+---------------+ | currentValue | minimumValue | assertion | +======================+======================+===============+ | NaN | Any value | FASLE | +----------------------+----------------------+---------------+ | Any value | NaN | FALSE | +----------------------+----------------------+---------------+ | infinity | NOT NaN | TRUE | +----------------------+----------------------+---------------+ | NOT NaN | -infinity | TRUE | +----------------------+----------------------+---------------+ | -infinity | NOT -infinity | FALSE | +----------------------+----------------------+---------------+ | NOT infinity | infinity | FALSE | +----------------------+----------------------+---------------+

Parameters

Name	Type	Comment	Kind
currentValue	LREAL	current value to check	input
minimumValue	LREAL	lower limit for the current value	input
message	AssertMessage	message if the assertion is false	input

Code

Declaration

METHOD valueIsMin
VAR_INPUT
	(* current value to check *)
	currentValue	:LREAL;
	(* lower limit for the current value *)
	minimumValue	:LREAL;
	(* message if the assertion is false *)
	message			:AssertMessage;
END_VAR