Rockwell Automation 900-TC32 Digital Temperature Controllers, Series B - Manual (Page 213)

Publication 900-UM007D-EN-E - January 2011
Parameter Adjustments & Application Considerations 4-77
Using the Extraction of Square Root Parameter
Extraction of Square Roots
Figure 4.167 — Extraction of Square Root Enable
• For analog inputs, the Extraction of the Square Root parameter is provided
for inputs so that differential pressure-type flow meter signals can be directly
input.
• The default setting for the Extraction of Square Root parameter is OFF. The
Extraction of Square Root Enable parameter must be configured to ON in
order to use this function.
Figure 4.168 — Extraction of Square Root Low-cut Point
• If the PV input (i.e., the input before extracting the square root) is higher
than 0.0% and lower than the low cut point configured in the Extraction of
Square Root Low-Cut Point parameter, the results of extracting the square
root will be 0.0%. If the PV input is lower than 0.0% or higher than 100.0%,
extraction of the square root will not be executed, so the result will be equal to
the PV input. The low-cut point is configured as normalized data for each
input, with 0.0 as the lower limit and 100.0 as the upper limit for the input
setting range.
Figure 4.169 —Extraction of the Square Root
sqr
off
sqrp
0.0
Argument 1 (Input Data)
Extraction of
square root
100% FS
100% FS 0
Extraction of square
root low-cut point