Omron RX2 Series User Manual page 431

Adjust PID2/PID3/PID4 Control
When a response is not stabilized in PID operation, adjust the control in accordance with the following
tables.
Adjust respective PID gains for each PID2/PID3/PID4.
Precautions for Correct Use
If acceleration/deceleration time is set too long, following of output frequency will be delayed
and control may not be successful.
In this case, set the acceleration/deceleration time short.
Output response is slow and feedback value does not
change swiftly even if PID target value was changed.
• Feedback value changes swiftly and is not stabilized.
• Overshooting or hunting occurs.
• Feedback value vibrates mildly.
• It takes time for operation to be stabilized.
PID target value and feedback value do not match eas-
ily.
• Response is slow even if proportional gain was
increased.
• Small hunting occurs.
Response due to disturbance is large and it takes time
until stabilization.
Gain correspondence table
PID2
PID3
PID4
High-function General-purpose Inverter RX2 Series User's Manual
Phenomenon
[1] Proportional gain
[AJ-13]
[AJ-33]
[AJ-53]
Examples of measures
Increase PID proportional gain according to the corre-
spondence table [1].
Decrease PID proportional gain according to the corre-
spondence table [1].
Increase PID integral gain according to the correspon-
dence table [2].
Decrease PID integral gain according to the correspon-
dence table [2].
Increase PID differential gain according to the corre-
spondence table [3].
Decrease PID differential gain according to the corre-
spondence table [3].
[2] Integral gain
[AJ-14]
[AJ-34]
[AJ-54]
8 Applied Settings
[3] Differential gain
[AJ-15]
[AJ-35]
[AJ-55]
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