YASKAWA Z1000 Technical Manual page 131

n b5-01: PI Function Setting
Enables or disables the PI operation and selects the PI operation mode.
No.
b5-01
Setting 0: PI Disabled
Setting 1: Output Frequency = PI Output 1
The PI controller is enabled and the PI output builds the frequency reference.
Setting 3: Output Frequency = Frequency Reference + PI Output 1
The PI controller is enabled and the PI output is added to the frequency reference.
n
b5-02: Proportional Gain Setting (P)
Sets the P gain applied to the PI input. Larger values will tend to reduce the error but may cause oscillations if set too high,
while lower values may allow too much offset between the setpoint and feedback.
No.
b5-02
n b5-03: Integral Time Setting (I)
Sets the time constant used to calculate the integral of the PI input. The shorter the integral time set to b5-03, the faster the
offset will be eliminated. If the integral time is set too short, however, overshoot or oscillation may occur. To turn off the
integral time, set b5-03 to 0.00.
No.
b5-03
n b5-04: Integral Limit Setting
Sets the maximum output possible from the integral block as a percentage of the maximum frequency (E1-04).
No.
b5-04
Note: On some applications, especially those with rapidly varying loads, the output of the PI function may show a fair amount of oscillation.
Program b5-04 to apply a limit to the integral output and suppress this oscillation.
n b5-06: PI Output Limit
Sets the maximum output possible from the entire PI controller as a percentage of the maximum frequency (E1-04).
No.
b5-06
n b5-07: PI Offset Adjustment
Sets the offset added to the PI controller output as a percentage of the maximum frequency (E1-04).
No.
b5-07
n b5-08: PI Primary Delay Time Constant
Sets the time constant for the filter applied to the output of the PI controller. Normally, change is not required.
No.
b5-08
Note: Useful when there is a fair amount of oscillation or when rigidity is low. Set to a value larger than the cycle of the resonant frequency.
Increasing this time constant may reduce the responsiveness of the drive.
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
Parameter Name
PI Function Setting
Name
Proportional Gain Setting (P)
Name
Integral Time Setting (I)
Name
Integral Limit Setting
Name
PI Output Limit
Name
PI Offset Adjustment
Name
PI Primary Delay Time Constant
5.2 b: Application
Setting Range
0, 1, 3
Setting Range
0.00 to 25.00
Setting Range
0.0 to 360.0 s
Setting Range
0.0 to 100.0%
Setting Range
0.0 to 100.0%
Setting Range
-100.0 to 100.0%
Setting Range
0.00 to 10.00 s
Default
0
Default
2.00
Default
0.5 s
Default
100.0%
5
Default
100.0%
Default
0.0%
Default
0.00 s
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