YASKAWA HV600 Technical Reference page 216

Ac drive bypass for hvac fan and pump applications
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5.2 b: Application
b5-04: Integral Limit
No.
Name
(Hex.)
b5-04
Integral Limit
(01A8)
RUN
Applications with loads that quickly change will cause the output of the PID function to oscillate. Set this parameter
to a low value to prevent oscillation, mechanical loss, and motor speed loss.
b5-05: Derivative Time (D)
No.
Name
(Hex.)
b5-05
Derivative Time (D)
(01A9)
RUN
When you increase the time setting, it will increase controller responsiveness, but it can also cause vibration. When
you decrease the time setting, it will suppress overshoot and decrease controller responsiveness.
Set b5-05 = 0.00 to disable D control.
b5-06: PID Output Limit
No.
Name
(Hex.)
b5-06
PID Output Limit
(01AA)
RUN
b5-07: PID Offset Adjustment
No.
Name
(Hex.)
b5-07
PID Offset Adjustment
(01AB)
RUN
b5-08: PID Primary Delay Time Constant
No.
Name
(Hex.)
b5-08
PID Primary Delay Time
Constant
(01AC)
RUN
Expert
Prevents resonance if there is a large quantity of mechanical friction or if rigidity is unsatisfactory. Set the value larger
than the resonant frequency cycle. A value that is too large will decrease drive responsiveness.
b5-09: PID Output Level Selection
No.
Name
(Hex.)
b5-09
PID Output Level Selection
(01AD)
Use this parameter in applications that decrease the drive output frequency when you increase the PID setpoint.
0 : Normal Output (Direct Acting)
A positive PID input increases the PID output (direct acting).
1 : Reverse Output (Reverse Acting)
216
Sets the upper limit for integral control (I) as a percentage of the Maximum Output Frequency.
Sets the derivative time (D) for PID control. This parameter adjusts system responsiveness.
Sets the maximum possible output from the PID controller as a percentage of the Maximum Output
Frequency.
Sets the offset for the PID control output as a percentage of the Maximum Output Frequency.
Sets the primary delay time constant for the PID control output. Usually it is not necessary to change
this setting.
Sets the polarity of the PID output.
Description
Description
Description
Description
Description
Description
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
Default
(Range)
100.0%
(0.0 - 100.0%)
Default
(Range)
0.00 s
(0.00 - 10.00 s)
Default
(Range)
100.0%
(0.0 - 100.0%)
Default
(Range)
0.0%
(-100.0 - +100.0%)
Default
(Range)
0.00 s
(0.00 - 10.00 s)
Default
(Range)
0
(0, 1)

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