34
YASKAWA
TOMPYEULA7002A LA700 Series Installation and Operation Instruction
Code
Name
Causes
Possible Solutions
bb
Baseblock
An external baseblock command was entered
through one of the MFDI terminals Sx, and the
drive output stopped as shown by an external
baseblock command.
Examine the external sequence and timing of the baseblock
command input.
CrST
Cannot Reset
The drive received a fault reset command when an
Up/Down command was active.
Turn off the Up/Down command then de-energize and re-energize
the drive.
dEv
Speed Deviation
The load is too heavy.
Decrease the load.
Acceleration and deceleration ramps are set too fast.
Increase the values set in
C1-01 to C1-08 [Acceleration/
Deceleration Ramps]
.
The
dEv
detection level settings are incorrect.
Adjust
F1-10 [Speed Deviation Detection Level]
and
F1-11
[Speed Deviation Detect DelayTime]
.
The load is locked up.
Examine the machine.
The holding brake is stopping the motor.
Release the holding brake.
dv3
Inversion Detection
E5-11 [Encoder Z-Pulse Offset]
is set incorrectly.
Correctly set the value for Δθ to
E5-11
as specified by the values
on the motor nameplate.
There is a new encoder or the motor rotation
direction changed.
Do Encoder Tuning.
An external force on the load side rotated the motor.
•
Make sure that the motor is rotating in the correct direction.
•
Find and repair problems on the load side that cause the motor
to rotate from the load side.
Noise interference along the encoder cable.
Correctly ground the shielded wire of the encoder cable.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
The setting for
F1-05 [Encoder 1 Rotation
Selection]
is the opposite of the direction of motor
rotation.
Correctly connect the motor wiring for each phase (U, V, W).
The drive incorrectly detected the motor magnetic
pole position.
When
U6-57 [PolePolarityDeterVal] < 819
, increase
n8-84
[Polarity Detection Current]
. Consult the motor manufacturer for
information about maximum setting values.
n8-84 [Polarity Detection Current]
is too low.
Increase
n8-84
from the default. Consult the motor manufacturer
for information about maximum setting values.
Pole Position Detection failed.
If you are using an IPM motor, do High Frequency Injection
Auto-Tuning.
The PG option or the encoder on the motor side is
damaged.
Repair the wiring and re-energize the drive, then replace the PG
option card or the PG if the problem continues.
The drive incorrectly detected the motor magnetic
pole position.
When
U6-57 [PolePolarityDeterVal] < 819
, set
n8-84 [Polarity
Detection Current > default setting
.
dv4
Inversion Prevention Detection
An external force on the load side rotated the motor.
•
Make sure that the motor is rotating in the correct direction.
•
Find and repair problems on the load side that cause the motor
to rotate from the load side.
•
Disable detection of this fault for applications that rotate the
motor from the load side in the opposite direction of the speed
reference. The drive will not detect this fault if
F1-19 = 0
[Deviation 4 Detection Selection = Disabled]
.
E5-11 [Encoder Z-Pulse Offset]
is set incorrectly.
Correctly set the value for Δθ to
E5-11
as specified by the values
on the motor nameplate.
There is a new encoder or the motor rotation
direction changed.
Do Encoder Tuning.
Noise interference along the encoder cable.
Correctly ground the shielded wire of the encoder cable.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
The drive incorrectly detected the motor magnetic
pole position.
If the value for
U6-57 [PolePolarityDeterVal]
is lower than 819,
increase the value set in
n8-84 [Polarity Detection Current]
.
Consult the motor manufacturer for information about maximum
setting values.
The setting of
n8-84 [Polarity Detection Current]
is
too low.
Increase the
n8-84
setting from the default. Consult the motor
manufacturer for information about maximum setting values.
Pole Position Detection failed.
If you are using an IPM motor, do High Frequency Injection
Auto-Tuning.
The PG option card or the encoder on the motor
side is damaged.
Repair the wiring and re-energize the drive, then replace the PG
option card or the PG if the problem continues.
dv6
Over Jerk
E5-11 [Encoder Z-Pulse Offset]
is set incorrectly.
Correctly set the value for Δθ to
E5-11
as specified by the values
on the motor nameplate.
Noise interference in the encoder cable.
Correctly ground the shielded wire of the encoder cable.
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
The PG option card or the encoder on the motor
side is damaged.
Repair the wiring and re-energize the drive, then replace the PG
option card or the PG if the problem continues.