Yaskawa L1000E AC Drive CIMR-LE†A - Manual (Page 128)

4 Start-Up Programming
128 YASKAWA TOEPYAIL1E01A YASKAWA AC Drive L1000E Quick Start Guide
Motor or machine
vibrates in During
Position Lock.
CLV
CLV/PM
The Position Lock control loop does not
respond fast enough.
• If vibration occurs at During Position Lock at start, first
decrease S3-02. If decreasing S3-02 does not resolve the
problem, decrease S3-01.
• Decrease S3-03 if vibration occurs During Position Lock at
stop.
The speed control is not responding quickly
enough when the brake is released.
Decrease C5-19 and then increase C5-20.
Vibrations with the
frequency equal to the
motor speed occur.
CLV
CLV/PM
Encoder vibrates.
Check the encoder mounting and the alignment of encoder
and motor shaft.
All
Mechanical problems. Check bearings and gearbox.
Rotational parts (motor armature, handwheel,
brake disk/drum) are not properly balanced.
Properly balance rotating parts.
Oscillations when
using an analog speed
reference.
All
The analog reference value is not stable or the
signal is noisy.
• Check the analog signal line connection. Use shielded
twisted pair cables.
• Apply a filter to the analog input signal by setting
parameter H3-13.
Top speed is different
in motoring and
regenerative mode.
OLV
Slip Compensation during Regenerative
operation is switched off. Make sure C3-04 is set properly and set parameter C3-05 to
0.
Speed reference and
motor speed do not
match when using an
analog reference
signal.
All
The drives analog input is not set according to
the signal level of the controller speed reference
output signal.
Check the gain and bias settings for the analog input that is
used to set the speed reference. Check parameters H3-03 and
H3-04 for input A1, check parameters H3-11 and H3-12 for
input A2.
Acceleration is longer
than set to C1-
parameters.
All The load is too high.
• Check if the acceleration rate set is not too high
(acceleration time is too short).
• Make sure the drive rated current is enough to fulfill the
application requirements.
• Make sure the load is not seized, car guide lubrication is
ok, etc.
V/f and
OLV
The load is too high and the current/torque
exceeds the stall prevention level. Check if the Stall Prevention Level at Acceleration in L3-03
is not set too small.
OLV, CLV
CLV/PM
The load is too high and the torque exceeds the
drives torque limits. Check it the Torque Limit parameters L7- are not set too
low.
Motor speed does not
match the speed
reference at constant
speed.
All The load is too high.
Make sure the drive rated current is enough to fulfill the
application requirements.
V/f
The load is too high and the current/torque
exceeds the stall prevention level. Check if the Stall Prevention Level During Run in L3-06 is
not set too low.
OLV, CLV
CLV/PM
The load is too high and the torque exceeds the
torque limits. Check it the Torque Limit parameters L7- are not set too
low.
High frequency
acoustic noise from
the motor.
All The carrier frequency is too low.
Increase the Carrier Frequency in parameter C6-03. If the
carrier frequency is set higher than the default setting, a
current derating must be considered.
Problem Control Mode and Possible Cause Corrective Action