In the following figure is given an example of the behavior of the threshold
comparator.
Example of threshold comparator behavior
MATH (max number = 16)
The Math operator performs the sum (or the difference)
between analog signals coming from an ANALOG INPUT
blocks.
The signals must have the same physical unit and must be
generated by sensors of the same type (4/20mA, 0/20mA or
0/10V) but they can have different scales.
Parameters
Input number:
Sum: it’s possible to sum from 2 to 8 signals.
Difference: it’s possible to perform difference of 2
signals.
Operation:
Sum: The result will be the sum of all the inputs. Difference: The result of the operation
will be the absolute value of the difference |(Ain1 - Ain2)| with relative sign (output Sign).
The Sign output will be at 0 (FALSE) if the sign of the difference is positive, while it will be
at 1 (TRUE) if the sign is negative.
Arithmetic average:
Setting Arithmetic Average box with Operation as Sum, the output value of this operator
will be the arithmetic average of the various inputs.
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