Omron RX2 Series User Manual page 418

8 Applied Settings
PID1 Disable Function [PID]
Turning ON the terminal temporarily disables PID operation and performs output according to fre-
quency command.
The figure input as PID command will be adopted for frequency command.
Adjustment of PID1 Control
When a response is not stabilized in PID function, adjust the control in accordance with the following
tables.
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.
• t 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.
Switching PID1 Gain
PID gain 1 and 2 can be switched by switching the input terminal function 055 [PRO].
In the case of using the [PRO] terminal, set 01 to PID1 gain switch method selection [AH-60].
PID deviation
Proportional gain 1 [AH-61]
Proportional gain 2 [AH-64]
Integral gain 1 [AH-62]
Integral gain 2 [AH-65]
Differential gain 1 [AH-63]
Differential gain 2 [AH-66]
8 - 18
Phenomenon
P control
[PRO] terminal
OFF
ON
OFF
ON
OFF
ON
Examples of measures
Increase PID1 proportional (P) gain 1 [AH-61].
Decrease PID1 proportional (P) gain 1 [AH-61].
Decrease PID1 integral (I) gain 1 [AH-62].
Increase PID1 integral (I) gain 1 [AH-62].
Increase PID1 differential (D) gain 1 [AH-63].
Decrease PID1 differential (D) gain 1 [AH-63].
+
I control
+
+
D control
[db-61]
[db-62]
[db-63]
High-function General-purpose Inverter RX2 Series User's Manual
Result of PID
calculation