YASKAWA CIMR-VU BA0001 Technical Manual page 244

5.9 n: Special Adjustments
No.
n8-49
<1> Setting range varies depending on drive software version. Software versions PRG: 1018 and later allow this parameter to be changed during Run.
PRG: 1018 and later: -200.0 to 200.0%
PRG: 1017 and earlier: -200.0 to 0.0%
n n8-51: Acceleration/Deceleration Time Pull-In Current (for PM OLV)
Sets the d-axis current during acceleration and deceleration as a percentage of the motor rated current (E5-03).
Adjustments to this setting may help in the following situations:
• Increase this setting when a large amount of starting torque is required.
• Lower this setting if there is excessive current during acceleration and deceleration.
No.
n8-51
n n8-54: Voltage Error Compensation Time Constant (for PM OLV)
Sets the time constant for voltage error compensation. Make changes to this parameter 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. Try to disable the compensation by setting
n8-51 = 0 if increasing does not help.
• Increase the value when oscillations occur at start.
No.
n8-54
n n8-55: Load Inertia (for PM OLV)
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 a STo fault (Motor Step-Out) might occur.
No.
n8-55
Setting 0: Below 1:10
The inertia ratio between the motor and the load is just less 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 a 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 a 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 a STo fault occurs as a result of impact
load or sudden acceleration/deceleration when n8-55 = 2.
n n8-62: Output Voltage Limit (for PM OLV)
Sets the output voltage limit to prevent output voltage saturation. This value should not be set higher than the actual input
voltage.
No.
n8-62
<1> Values shown here are for 200 V class drives. Double values when using a 400 V class drive.
244
Name
d Axis Current for High Efficiency Control
Name
Acceleration/Deceleration Time Pull-In Current
Name
Voltage Error Compensation Time Constant
Name
Motor/Load Inertia Ratio
Name
Output Voltage Limit
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
Setting Range
<1>
Setting Range
0 to 200%
Setting Range
0.00 to 10.00
Setting Range
0 to 3
Setting Range
<1>
0.0 to 230.0 Vac
Default
Determined by
E5-01
Default
Determined by
E5-01
Default
1.00
Default
0
Default
<1>
230 Vac