7
-8
UL3
Undertorq
Det 1
Undertorque Detected 1
There has been a current less than
the setting in L6-02 for longer than
the setting in L6-03.
–
• Make sure that the settings in
L6-02 and L6-03 are appropri-
ate.
• Check the mechanical system
and correct the cause of the
overtorque.
UL4
Undertorq
Det 2
Undertorque Detected 2
There has been a current less than
the setting in L6-05 for longer than
the setting in L6-06.
–
• Make sure that the current set-
ting in L6-05 and time setting in
L6-06 are appropriate.
• Check the mechanical system
and correct the cause of the
overtorque.
OS
Overspeed
Det
Overspeed
The speed has been greater than the
setting in F1-08 for longer than the
setting in F1-09.
Overshooting/Undershooting are occur-
ring.
Adjust the gain again.
The reference speed is too high.
Check the reference circuit and
reference gain.
The settings in F1-08 and F1-09 aren't
appropriate.
Check the settings in F1-08 and
F1-09.
PGO
PG Open
PG Disconnection Detected
PG pulses were input when the
Inverter was outputting a frequency.
There is a break in the PG wiring.
Fix the broken/disconnected wir-
ing.
The PG is wired incorrectly. Fix the wiring.
Power isn't being supplied to the PG. Supply power to the PG properly.
Brake is applied to the motor.
Check for open circuit when using
brake (motor).
DEV
Speed
Deviation
Excessive Speed Deviation
The speed deviation has been
greater than the setting in F1-10 for
longer than the setting in F1-11.
The load is too heavy. Reduce the load.
The acceleration time and deceleration
time are too short.
Lengthen the acceleration time and
deceleration time.
The load is locked. Check the mechanical system.
The settings in F1-10 and F1-11 aren't
appropriate.
Check the settings in F1-10 and
F1-11.
Brake is applied to the motor.
Check for open circuit when using
brake (motor).
CF
Out of
Control
Control Fault
The torque limit was reached con-
tinuously for 3 seconds or longer
during a deceleration stop during
open-loop vector 1 control.
Motor constant settings are not correct.
• Check the motor constants.
• Perform autotuning.
An error occurred in the speed esti-
mation calculation for open-loop
vector 2 control.
Refer to Corrective Actions for Control Faults (CF) on page 7-15.
FBL
Feedback
Loss
PID Feedback Reference Lost
A PID feedback reference loss was
detected (b5-12 = 2) and the PID
feedback input was less than b5-13
(PID feedback loss detection level)
for longer than the time set in b5-14
(PID feedback loss detection time).
The settings in b5-13 and b5-14 aren’t
appropriate.
Check
the settings in b5-13 and
b5-14.
The wiring of the PID feedback circuit
is incorrect.
Fix the wiring.
Table 7.1 Fault Displays and Processing (Continued)
Display Meaning Probable Causes Corrective Actions
TOE-S616-60.1.book 8 ページ ２０１７年８月４日 金曜日 午後３時４１分
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