Yaskawa AC Drive Z1000 AC Drive HVAC Fan - Manual (Page 126)

No. Name Setting Range Default
n8-45 Speed Feedback Detection Control Gain 0.00 to 10.00 0.80
n n8-47: Pull-In Current Compensation Time Constant (OLV/PM)
Sets the time constant for pull-in current to match the actual current.
Although this setting rarely needs to be changed, adjustment may be necessary under the following conditions:
• Increase this setting when it takes too long for the reference value of the pull-in current to match the target value.
• Decrease this setting if motor oscillation occurs.
No. Name Setting Range Default
n8-47 Pull-In Current Compensation Time Constant 0.0 to 100.0 s 5.0 s
n n8-48: Pull-In Current (OLV/PM)
Sets the d-Axis current during no-load operation at a constant speed. Set as a percentage of the motor rated current.
• Increase this setting when hunting occurs or the motor speed is unstable while running at a constant speed.
• Slightly reduce this value if there is too much current when driving a light load at a constant speed.
No. Name Setting Range Default
n8-48 Pull-In Current 20 to 200% 30%
n n8-49: d-Axis Current for High Efficiency Control (OLV/PM)
Sets the d-Axis current reference when running with high load at constant speed. When using an IPM motor, this parameter
uses the reluctance torque to increase the efficiency and reduce energy consumption. Set this parameter to 0 when using an
SPM motor.
Although this setting rarely needs to be changed, adjustment may be necessary under the following conditions:
• Lower the setting if motor operation is unstable when driving heavy loads.
• If motor parameters (E5-oo) have been changed, this value will be reset to 0 and will require readjustment.
No. Name Setting Range Default
n8-49 d Axis Current for High Efficiency Control -200.0 to 0.0%
Determined by
o2-04
n n8-51: Acceleration/Deceleration Pull-In Current (OLV/PM)
Sets the pull-in current during acceleration and deceleration as a percentage of the motor rated current (E5-03).
Adjustment may be necessary under the following conditions:
• Increase this setting when a large amount of starting torque is required.
• Lower this setting if there is excessive current during acceleration.
No. Name Setting Range Default
n8-51 Acceleration/Deceleration Pull-In Current 0 to 200% 50%
n n8-54: Voltage Error Compensation Time Constant (OLV/PM)
Sets the time constant for voltage error compensation.
Adjustment may be necessary under the following conditions:
• Adjust the value when hunting occurs at low speed.
• Increase the value in steps of 0.1 when hunting occurs with sudden load changes. Set n8-51 to 0 to disable the compensation
if increasing n8-54 does not help.
• Increase the value when oscillations occur at start.
No. Name Setting Range Default
n8-54 Voltage Error Compensation Time Constant 0.00 to 10.00 1.00
1.9 n: Special Adjustments
126 YASKAWA ELECTRIC SIEP YAIZ1U 03A YASKAWA AC Drive – Z1000 Programming Manual