YASKAWA CR700, Technical Manual, Page: 780 / 886

11.10 n: Special Adjustment
780 YASKAWA SIEPC71061723A YASKAWA AC Drive CR700 Technical Manual
If you set n5-03 [Feed Forward Control Gain] too high, the motor speed will momentarily increase to more than
the set frequency.
◆
n6: Online Tuning
n6 parameters are used to set the online tuning function for motor line-to-line resistance.
The Online Tuning for motor line-to-line resistance is used to prevent degradation of speed control accuracy due
to motor temperature fluctuation and motor stalls due to insufficient torque.
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n6-01: Online Tuning Selection
No.
(Hex.)
Name Description
Default
(Range)
n6-01
(0570)
Online Tuning Selection
Sets the type of motor data that Online Tuning uses for OLV control.
0
(0 - 2)
0 : Disabled
1 : Line-to-Line Resistance Tuning
The drive adjusts the motor line-to-line resistance during run. This function is effective when the motor speed is 6
Hz or less. This function improves overload tolerance within the low speed range.
2 : Voltage Correction Tuning
The drive adjusts the output voltage during run. This function improves overload tolerance and suppresses issues
of speed precision losses because of increasing motor temperatures.
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n6-05: Online Tuning Gain
No.
(Hex.)
Name Description
Default
(Range)
n6-05
(05C7)
Expert
Online Tuning Gain
Sets the compensation gain when n6-01 = 2 [Online Tuning Selection = Voltage Correction
Tuning] . Usually it is not necessary to change this parameter.
1.0
(0.1 - 50.0)
When you use a motor that has a large secondary circuit time constant, decrease the setting value.
If the drive detects
oL1 [Motor Overload] , increase the setting value in 0.1-unit increments.
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n6-11: Online Resistance Tuning
No.
(Hex.)
Name Description
Default
(Range)
n6-11
(1B56)
Expert
Online Resistance Tuning
Sets the responsiveness for online resistor tuning. Set this parameter to approximately 1.000 to
enable the function. The function is disabled when the value is 0.000 .
0.000
(0.000 - 1.000)
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV
V/f CL-V/f OLV CLV AOLV