KEB COMBIVERT F5, Reference Manual

Page: 289 / 349

289
Diagnostics and Troubleshooting
*Additional information at end of section
Error/Message Alt. /
(NUM)
Description Cause/Solution/Troubleshoot
Speed
Following Error
(continued) -
(152) Speed gains set too low.
If the speed following error occurs during
acceleration or deceleration, the speed tracking
may lag if the speed control gains are too low.
Increase corresponding proportional speed
gain for acceleration or deceleration.
Learn system inertia.
If the speed following error occurs at takeoff,
there may be high break away friction.
Increase LC11 KI Speed Offset Acceleration.
Mechanical Issues/High Friction.
Modulation grade exceeds maximum.
If the modulation grade in Diagnostic Screen #2
or DG10 exceeds 100% there may be a loss of
speed control. This may also prevent the motor
from reaching the command speed.
Speed
Selection Error* -
(153) Speed command
input missing at
beginning of run. For digital, binary and serial binary input speed selection
control modes, the Speed Selection Error is triggered if
a speed input is not given before the LT01, LT03 timers
expire. These timers start after the drive enable and
direction have been given. Not active on inspection run.
Refer to additional information at end of section.
Unintended
Movement* -
(158) After a normal
high speed run, if
the motor moves
by more than the
value set in LX25
then Unintended
Movement will
occur and can
only be reset
manually by
pressing F1 and
F4 simultaneously
on the keypad. Unintended Movement is not monitored from inspection
speed selection. For analog and serial speed control
modes, an input can be programmed to indicate
inspection runs.
Refer to additional information at end of section.