Using The Extraction Of Square Root Parameter - Omron E5AN-H User Manual

Using the Extraction of Square Root Parameter

PID
calculations

4-18 Using the Extraction of Square Root Parameter

Extraction of Square
Roots
Extraction of Square Root Enable
sqr
off
144
If the Direct Setting of Position Proportional MV parameter is set to ON during
close control, valve opening can be specified. The default setting is 0.0, so
open and close outputs are adjusted so that valve opening will be 0.
Parameter
name
MV at PV
ERROR
Note The order of priority is as follows: Manual MV > MV at stop > MV at PV error.
• The following table shows the operation when a potentiometer error
occurs when the Direct Setting of Position Proportional MV parameter is
set to ON.
MV at stop ≥ 100
MV at stop ≤ 0
When the MV at stop is other than the above, the open and close outputs
will both be OFF.
• The order of priority of the MVs is illustrated in the following diagram.
MV upper limit
Manipulated variable
RSP input error
Time Potentiometer input
error (close control)
MV lower limit
Note When the Manual MV Limit Enable parameter is set to ON, the setting range
will be the MV lower limit to the MV upper limit.
• For analog inputs, the Extraction of 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 set to ON in
order to use this function.
Setting range
−5.0 to 105.0 for standard control
−105.0 to 105.0 (heating/cooling control)
Position-proportional Control
Close control and Direct Setting of Posi-
tion Proportional MV parameter ON: −5.0
to 105.0
Floating control or Direct Setting of Posi-
tion Proportional MV parameter OFF:
CLOS (Control output 2 ON)
HOLD (Control outputs 1 and 2 both OFF)
OPEN (Control output 1 ON)
MV at PV Error
RUN/STOP
MV at Stop
Section 4-18
Unit
% or none 0.0 or
HOLD
Open output ON
Close output ON
Manual MV
(See note.)
Auto/manual switch
Default
Output