YASKAWA E1000 User Manual

5.9 n: Special Adjustments
244 YASKAWA ELECTRIC SIEP C710616 35D YASKAWA AC Drive E1000 Technical Manual
■ 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).
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.
■
n8-54: Voltage Error Compensation Time Constant (OLV/PM)
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 n8-54 does not help.
• Increase the value when oscillations occur at start.
■
n8-55: Load Inertia (OLV/PM)
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 the STo fault (Motor Step-Out) may occur.
For large inertia loads or to improve speed control response, increase this setting from 0. Oscillations may occur if this
value is set too high with low inertia load.
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 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.
■
n8-62: Output Voltage Limit
Sets the output voltage limit to prevent voltage saturation. This parameter rarely requires adjustment. Never set this value
higher than the actual input voltage.
No. Name Setting Range Default
n8-51 Acceleration/Deceleration Pull-In Current 0 to 200% 50%
No. Name Setting Range Default
n8-54 Voltage Error Compensation Time Constant 0.00 to 10.00 1.00
No. Name Setting Range Default
n8-55 Load Inertia 0 to 3 0
No.
<1> Values shown here are for 200 V class drives. Double values when using a 400 V class unit.
Name Setting Range Default
n8-62 <1> Output Voltage Limit 0.0 to 230.0 Vac 200 Vac
SIEP_C710616_35.book 244 ページ ２０１５年１１月３０日 月曜日 午後２時２分

YASKAWA E1000 Specifications

General

Brand	YASKAWA
Model	E1000
Category	Controller
Language	English