LSIS LSLV-S100 - Page 216

202
Learning Advanced Features
Problem
Relevant function
code
Troubleshooting
massive load change while
the motor is operated at mid-
speed (above 30Hz).
Speed variation occurs during
an operation at rated motor
speed, or during an
overloaded high speed
operation.
Cn.45 PM Flux FF %
Cn.50 V Con HR
Cn.51 V Con Ki
If the motor is operated at the rated
speed, try decreasing the value at Cn.50
in 5% increments.
If the motor response is slow, try
increasing the value at Cn.51 in 5%
increments (or, try increasing the value at
Cn.45 in 100% increments).
“OC1” fault trip or jerking
occurs during a high speed
operation.
Cn.41 PM SpdEst Kp
Cn.42 PM SpdEst Ki
Try increasing the value at Cn. 41 in
increments of 10 and the value at Cn.42
in increments of 1.
Note that a fault trip may occur if the
values at Cn. 41 and Cn.42 are set too
high.
Jerking occurs during a low
speed operation.
Cn.13 ASR I Gain 1
Try increasing the value at Cn.13 (low
speed range speed controller I gain) to
eliminate jerking.
A “clanking” noise is heard at
the beginning of startup or
during deceleration.
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
Cn.40 PMdeadVolt
Per
Try increasing the values at Cn.12 and
Cn.13 in 10% increments, or try
decreasing the value at Cn.40 in 10%
decrements.
The motor cannot reach the
speed reference when it is
operated at or above the
rated speed, or when the
acceleration is not
responsive.
Cn.50 V Con HR
Cn.51 V Con Ki
Try increasing the value at Cn.50 in 1%
increments if the motor cannot reach the
speed reference.
Try increasing the value at Cn.51 in 10%
increments if the motor acceleration is not
responsive.
“OC1” trip occurs after an
abrupt regenerative load
(over 100%).
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
Try decreasing the values at Cn.12 and
Cn.13 in 10% decrements.
The motor jerks during
acceleration.
Cn.42 PM SpdEst Ki
Try increasing the speed estimator
proportional gain at Cn.42 in increments
of 5.
A massive current rises when
the motor is stopped during a
20:1 speed startup.
Cn.13 ASR I Gain 1
Try increasing the value at Cn. 13 in 10%
increments.
An oscillation occurs when an
abrupt load is applied to the
motor during a low speed
operation.
Cn.41 PM SpdEst Kp
Cn.42 PM SpdEst Ki
Try increasing the values at Cn. 41 and
Cn.42 in 10% increments.
During a PM speed search,
the speed search stops at
Cn.69 SS Pulse Curr
Try decreasing the value at Cn.69 in 5%
decrements.