Omron E5AR - MANUAL 2 User Manual page 118

● Conditions for activation of disturbance overshoot adjustment
Disturbance rectification band
1 do-b
0.000
l.adj
Disturbance judgement width
1 dojw
0.00
l.adj
• If the deviation is greater than the "Disturbance judgement width"
after the PV is rectified to the "Disturbance rectification band", the
disturbance overshoot adjustment function activates.
• When the "Disturbance judgement width" is a positive value, distur-
bance overshoot adjustment will activate when a disturbance occurs
that makes the PV fall. When the "Disturbance judgement width" is a
negative value, disturbance overshoot adjustment will activate when
a disturbance occurs that makes the PV rise.
• Disturbance overshoot adjustment does not activate in the following
situations:
• When "Disturbance rectification band" or "Disturbance judgement
width" is set to "0".
• When the SP is changed (when the SP change width exceeds
the "Disturbance rectification band")
• During AT
• During ON/OFF control (P = 0.00)
• During PD control (I = 0.00)
• The units for the "Disturbance rectification band" and "Disturbance
judgement width" settings are % FS. As such, if the input type is
K(1) -200.0 to 1300.0°C and you wish to set the "Disturbance
judgement width" to 15.0°C,
15.0°C/1500.0°C 100 = 1.00 %FS
hence "1.00" should be set.
Temper- Disturbance overshoot adjuster does not operate
ature
SP
Setting data
Disturbance overshoot
adjustment enable
Disturbance gain
Disturbance time constant
Disturbance rectification
band
Disturbance judgement
width
5.2 Control functions
Disturbance overshoot adjuster operates
Setting range Units
OFF: Disabled,
ON: Enabled
-1.00 to 1.00
0.01 to 99.99
0.000 to 9.999
-99.99 to 99.99
Disturbance
rectification
band
Disturbance
judgement
width
Time
Default
value
OFF
0.65
1.00
%FS 0.000
%FS 0.00
5-15