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b5-01: PID Function Setting
Enables or disables the PID operation and selects the PID operation mode.
No. Parameter Name Setting Range Default
b5-01 PID Function Setting 0 to 4 0
Setting 0: PID disabled
Setting 1: Output Frequency = PID Output 1
The PID controller is enabled and the PID output builds the frequency reference. The PID input is D controlled.
Setting 2: Output Frequency = PID Output 2
The PID controller is enabled and the PID output builds the frequency reference. The PID feedback is D controlled.
Setting 3: Output Frequency = Frequency Reference + PID Output 1
The PID controller is enabled and the PID
output is added to the frequency reference. D control is applied to the difference
of the feedback value (U5-02) and the setpoint.
Setting 4: Output Frequency = Frequency Reference + PID Output 2
The PID controller is enabled and the PID output is added to the frequency reference. Applies D control on the feedback
value (U5-06).
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b5-02: Proportional Gain Setting (P)
Sets the P gain that is applied to the PID input. A large value will tend to reduce the error, but may cause instability
(oscillations) if too high. A small value may allow too much offset between the setpoint and feedback.
No. Name Setting Range Default
b5-02 Proportional Gain Setting (P) 0.00 to 25.00 1.00
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b5-03: Integral Time Setting (I)
Sets
the time constant that is used to
calculate the integral of the PID input. The smaller the integral time set to b5-03, the
faster the offset will be eliminated. If set too short, it can cause overshoot or oscillations. To turn off the integral time, set
b5-03 = 0.00.
No. Name Setting Range Default
b5-03 Integral Time Setting (I) 0.0 to 360.0 s 1.0 s
Zero
offset with
integral action
No Intregral
With Intregral
PID
feedback
Setpoint
Offset
Setpoint
Feedback
Feedback
Time
Time
Figure 5.18 Offset Elimination by Integral Operation
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b5-04: Integral Limit Setting
Sets the maximum output possible from the integral block. Set as a percentage of the maximum frequency (E1-04).
No. Name Setting Range Default
b5-04 Integral Limit Setting 0.0 to 100.0 100.0
Note: On some applications, especially those with rapidly varying
loads, the output of the PID function may show a fair amount of oscillation.
To suppress this oscillation, a limit can be applied to the integral output by programming b5-04.
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b5-05: Derivative Time (D)
Sets the time the drive predicts the PID input/PID feedback signal based on the derivative of the PID input/PID feedback.
Longer time settings will improve the response but can cause vibrations. Shorter settings will reduce the overshoot but
also reduce the controller responsiveness. D control is disabled by setting b5-05 to zero seconds.
5.2 b: Application
134
YASKAWA ELECTRIC SIEP C710606 16C YASKAWA AC Drive – V1000 Technical Manual
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