BENSHAW RSi H2 Series - Page 257

Sensorless Vector Control
245
890053-00-02
Problem
Function code
Troubleshooting
CON-32 S-Est I
Gain1
CON-33 S-Est I
Gain2
At mid speed (30 Hz or higher), increase the value of
CON-31 by increments of 500. If the parameter setting is
too extreme, over current trip may occur at low speed,
lower CON-31 and increase CON-32.
The motor speed level
decreases.
MOT-11 Auto Tuning
Select 4, Tr (static type) from MOT-11 and run Rotor time
constant tuning.
If over current trip occurs
at starting.
CON-48 ACR P Gain
Lower both the CON-48 and CON-49.
CON-49 ACR I Gain
The motor cannot reach
the speed reference when
it is operated at or above
the rated speed, or when
the acceleration is not
responsive.
CON-50 V Con HR
Increase the value at CON-50 in 1% increments if the
motor cannot reach the speed reference.
Increase the value at CON-51 in 10% increments if the
motor acceleration is not responsive.
CON-51 V Con Ki
Speed variation occurs at
rated motor speed, or
when excessive current
flows due to insufficient
voltage during high speed
operation.
CON-50 V Con HR
If the motor is operated at the rated speed, decrease the
value at CON-50 in 5% increments.
If the motor response is slow, increase the value at CON-
51 in 5% increments.
CON-51 V Con Ki
Control is unstable.
CON-85 Flux P
Gain1
Increase P Gains, Decrease I Gains.
CON-86 Flux P
Gain2
CON-87 Flux P
Gain3
If speed loss or OC trip
occurs.
CON-88 Flux I
Gain1
(below CON-95)
Decrease I Gains.
If current imbalance occurs
CON-89 Flux I
Gain2
(CON-95 below 9Hz)
Increase I Gains. If OLT occurs due to high I gains, lower I
gains.
CON-90 Flux I
Gain3
If Speed error is negative
(-), compensate by
increasing Slip Comp.
CON-97 SL Slip
Comp1
CON-98 SL Slip
Comp2
For 575V inverter only. Comp1 is for motoring mode,
Comp2 is for generating mode. Increase to reduce speed
error.
*Hunting: Symptom of irregular vibration of the equipment.