YASKAWA Lift Inverter L1000V, Technical Manual

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5.9 n: Special Adjustments
YASKAWA EUROPE SIEP YASKAWA AC Drive L1000V Technical Manual 149
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5.9 n: Special Adjustments
These parameters handle a variety of specialized adjustments and functions, including AFR Control, resistance between
motor lines, and current detection adjustments.
u
n2: Speed Feedback Detection Control (AFR) Tuning
These parameters are used to achieve speed stability when a load is suddenly applied or removed.
Note: Properly set all motor parameters or perform Auto-Tuning before making changes to the AFR parameters.
n
n2-01: Speed Feedback Detection Control (AFR) Gain
Sets the internal speed feedback detection control gain in the AFR. Available in vector control modes.
Although this parameter rarely needs to be changed, it may require adjustment in the following situations:
• If hunting occurs, increase the setting value in steps of 0.05 while checking the response.
• If response is low, decrease the setting value in steps of 0.05 while checking the response.
n
n2-02, n2-03: Speed Feedback Detection Control (AFR) Time Constant 1, 2
Parameter n2-02 sets the time constant normally used by AFR.
Parameter n2-03 sets the time constant during regenerative operation.
Note: Setting parameter n2-02 higher than n2-03 will trigger an oPE08 error.
Although these parameters rarely need to be changed, they may require adjustment in the following situations:
• If hunting occurs, increase n2-02. If response is low, decrease it.
• Increase n2-03 if overvoltage occurs with high inertia loads at the end of acceleration or with sudden load changes.
• If setting n2-02 to a higher value, also increase C4-02 (Torque Compensation Delay Time Constant 1) proportionally.
u
n6: Online Tuning
Online Tuning compensates insufficient torque and diminished speed control accuracy due to fluctuating motor
temperature.
n
n6-01: Online Tuning Selection
Selects the type of motor data Online Tuning uses for Open Loop Vector Control.
Setting 0: Disabled
Setting 1: Line-to-line resistance tuning
This setting enables line-to-line resistance online tuning. This procedure is effective for speed values up to 6 Hz and
improves the overload capacity in the low speed range by adjusting the value set for the motor resistance.
Setting 2: Voltage correction
The drive adjusts the output voltage during run to improve overload tolerance and minimize the effects of high
temperatures on speed accuracy.
Note: This setting can only be selected if the Energy Saving function is disabled (b8-01 = 0).
No. Name Setting Range Default
n2-01 Speed Feedback Detection Control (AFR) Gain 0.00 to 10.00 1.00
No. Name Setting Range Default
n2-02 Speed Feedback Detection Control (AFR) Time Constant 1 0 to 2000 ms 50 ms
n2-03 Speed Feedback Detection Control (AFR) Time Constant 2 0 to 2000 ms 750 ms
No. Name Setting Range Default
n6-01 Online Tuning Selection 0 to 2 2