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LD Language Elements
130
SR2MAN01 11/2007
Configuration
from Front Panel
The simple comparison formula is as follows:
The comparison formula, for a comparison with hysteresis:
The parameters to enter are the following:
z Values to compare,
z Comparison operator,
z Reference value,
z Hysteresis parameter,
z Parameter lock.
Values to compare:
Symbol of values to compare:
These variables are chosen from among the following:
z Numbered analog inputs from IB to IG (maximum configuration),
z Reference value R
Comparison operator:
The comparison operator is chosen using the number in the upper right-hand side
of the screen.
The table below provides the correspondence between this number and the
comparison formula that will be used:
Number Comparison formula
1x1>x2
2x1≥ x2
3x1=x2
4x1≠ x2
5x1≤ x2
6x1<x2
7 comparison with hysteresis: x1 - H ≤ x2 ≤ x1 - H
xl <Comparison Operator > x2
x1 - H ≤ ≤ x1 + Hx2
x1 x2