Yaskawa CIMR-UU4A0216F [310/644] N8 55 load inertia

Yaskawa CIMR-UU4A0302A [310/644] N8 55 load inertia
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.
Note: This parameter is only available in OLV/PM.
No. Name Setting Range Default
n8-54 Voltage Error Compensation Time Constant 0.00 to 10.00 1.00
n
n8-55: Load Inertia
Sets
the ratio
between motor inertia and the inertia of the connected machinery. If this value is set too low, the motor may not
start very smoothly and trigger an STo (Pull-Out Detection) fault.
Increase this setting for large inertia loads or to improve speed control response. A high setting with low inertia load may
cause oscillation.
Note: This parameter is only available in OLV/PM.
No. Name Setting Range Default
n8-55 Load Inertia 0 to 3 0
Setting 0: Below 1:10
The inertia ratio between the motor and the load is lower than 1:10.
Setting 1: Between 1:10 and 1:30
The inertia ratio between the motor and the load is between 1:10 and 1:30. Set n8-55 to 1 if an STo fault occurs as a result of
impact load or sudden acceleration/deceleration when n8-55 = 0.
Setting 2: Between 1:30 and 1:50
The inertia ratio between the motor and the load is between 1:30 and 1:50. Set n8-55 to 2 if an STo fault occurs as a result of
impact load or sudden acceleration/deceleration when n8-55 = 1.
Setting 3: Beyond 1:50
The inertia ratio between the motor and the load is higher than 1:50. Set n8-55 to 3 if an STo fault occurs as a result of impact
load or sudden acceleration/deceleration when n8-55 = 2.
n
n8-57: High Frequency Injection
Injects a high frequency into the motor to detect motor speed.
Note: This parameter is only available in AOLV/PM.
No. Name Setting Range Default
n8-57 High Frequency Injection 0, 1 0
Setting 0: Disabled
Disable n8-57 with SPM motors. The speed control range will be limited to approximately 1:20.
Setting 1: Enabled
Enable n8-57 with IPM motors. This allows precise speed detection in a speed control range of approximately 1:100.
Note: 1. This function generates some audible noise in the motor up to a certain speed.
2. Set E1-09 to 0.0 when using zero speed control.
n
n8-62: Output Voltage Limit (for PM Motors)
Sets the output voltage limit to prevent voltage saturation. Do not set this value higher than the actual input voltage.
Note: This parameter is only available in OLV/PM, AOLV/PM, and CLV/PM.
No. Name Setting Range Default
n8-62 Output Voltage Limit (for PM Motors)
0.0 to 250.0 Vac
<1>
200 Vac
<1>
<1> Values shown are specific to 200 V class drives. Double value for 400 V class drives.
n
n8-69: Speed Calculation Gain
Sets the proportional gain for Phase Locked Loop (PLL) control of an extended observer.
5.9 n: Special Adjustments
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YASKAWA ELECTRIC SIEP C710636 04C U1000 Industrial MATRIX Drive Technical Manual

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