Omron VARISPEED E7 User Manual page 248

PI Feedback Input Methods
Select one of the following PI control feedback input methods
Input Method
Analog input A2
Analog input A1
(Differential Mode)
If H3-09 is set to 16, the PI differential mode is activated. Both analog inputs (A1 and A2) become feedback
inputs and the difference between both (A1 - A2) becomes the feedback value for the PI controller. The moni-
tor U1-24 becomes the feedback 1 monitor, U1-53 becomes the feedback 2 monitor.
In PI differential mode the PI target value can be set using parameter b5-07 (PI offset or PI differential set-
point).
PI Adjustment Examples
Suppressing Overshoot
If overshoot occurs, reduce Proportional gain (P), and increase integral time (I).
Response
Set a Rapidly Stabilizing Control Condition
To rapidly stabilize the control even if overshoot occurs, reduce integral time (I).
Response
Suppressing Long-cycle Vibration
If vibration occurs with a longer cycle than the integral time (I) set value, lengthen the integral time (I) to sup-
press the vibration.
Response
Set H3-09 (Analog Input A2 Function Selection) to B (PI feedback).
(Default when PI control is enabled)
Set H3-09 to 16. Analog input A1 becomes the feedback 1 input and the analog input
A2 becomes the feedback 2 input.
Before adjustment
After adjustment
Before adjustment
After adjustment
Before adjustment
After adjustment
Setting Conditions
Time
Time
Time
Individual Functions
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