Yaskawa Z1000 AC Drive HVAC - Manual (Page 155)

Setting 0: Current Detection
Setting 1: Speed Estimation
n b3-25: Speed Search Wait Time
Sets the wait time between Speed Search restarts. Increase the wait time if problems occur with overcurrent, overvoltage, or
if the SEr fault occurs.
No. Name Setting Range Default
b3-25 Speed Search Wait Time 0.0 to 300.0 s 0.5 s
n b3-27: Start Speed Search Select
Selects a condition to activate Speed Search Selection at Start (b3-01) or External Speed Search Command 1 or 2 from the
multi-function input.
No. Name Setting Range Default
b3-27 Start Speed Search Select 0, 1 0
Setting 0: Triggered when a Run Command Is Issued (Normal)
Setting 1: Triggered when an External Baseblock Is Released
n b5-01: PI Function Setting
Enables or disables the PI operation and selects the PI operation mode.
No. Parameter Name Setting Range Default
b5-01 PI Function Setting 0, 1, 3 0
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. Name Setting Range Default
b5-02 Proportional Gain Setting (P) 0.00 to 25.00 2.00
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. Name Setting Range Default
b5-03 Integral Time Setting (I) 0.0 to 360.0 s 0.5 s
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. 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 PI function may show a fair amount of oscillation.
Program b5-04 to apply a limit to the integral output and suppress this oscillation.
4.13 Advanced Drive Setup Adjustments
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual 155
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Start-Up Programming & Operation