N700E INSTRUCTION MANUAL
5-34
Remark
1. If satisfactory performance through auto-tuning cannot be fully obtained,
please adjust the motor constants for the observed symptoms according to the table below.
Operation
status
Symptom
Adjustment
Parameter
Powered
running
(status with a
accelerating
torque)
When low frequency
(a few Hz) torque is
insufficient.
Slowly increase the motor constant R1 in relationto
auto-tuning data within 1 to 1.2 times R1.
H08/H10
When the speed
deviation is negative.
Slowly increase the rating motor slip H07 in
relationto auto-tuning data within 1.5 times H07
H07
When the speed
deviation is positive.
Slowly decrease the rating motor slip H07
inrelationto auto-tuning data within 0.5 times H07
H07
When over current
protection is operated
at injection of load.
Slowly increase the motor no load current in
relationto auto-tuning data within 1 to 1.2 times.
H06
Regeneration
(status with a
decelerating
torque)
When low frequency
(a few Hz) torque is
insufficient.
Slowly increase the motor constantR1 in relation to
auto-tuning data within 1 to 1.2 times R1.
H08/H10
Slowly increase the motor no load current in
relation to auto-tuning data within 1 to 1.2 times.
H06
Decrease the carrier frequency.
b11
2. If the inverter capacity is more than twice the capacity of the motor in use, the inverter
may not achieve its full performance specifications.
3. When DC injection braking is enabled, the motor constant will not be accurately set.
Therefore, disable DC injection braking before starting the auto-tuning procedure.
4. The motor will rotate up to 80% of base frequency : make sure that acceleration or
deceleration is not operated. If then, decrease the manual torqueboost setting value.
5. Be sure if motor is in standstill before you carry out an auto-tuning.
Auto-tuning data at the rotating motor status may be the incorrect results.
6. If the auto-tuning procedure is interrupted by the stop command, the auto-tuning constants
may be stored in the inverter. It will be necessary to store the inverters factory defaults setting.
