
7
-8
UL3
欠转矩
检出 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
欠转矩
检出 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
电机过速
Overspeed
The speed has been greater than the
setting in F1-08 for longer than the
setting in F1-09.
Overshooting/Undershooting are
occurring.
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 回路
故障
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
电机速度
偏差过大
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
控制故障
Control Fault
The torque limit was reached continu-
ously for 3 seconds or longer during a
deceleration stop during open-loop
vector 1 control.
Motor constant settings are not cor-
rect.
• Check the motor constants.
• Perform autotuning.
An error occurred in the speed estima-
tion calculation for open-loop vector 2
control.
Refer to
Corrective Actions for Control Faults (CF)
on page 7-14.
FBL
反馈丧失
PID Feedback Reference Lost
A PID feedback reference loss was
detected (b5-12 = 2) and the PID feed-
back 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