134
YASKAWA
TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Code
Name
Causes
Possible Solutions
oL4
Overtorque Detection
2
A fault occurred on the
machine.
Example: The machine is
locked.
Examine the machine and remove the
cause of the fault.
The parameters are incorrect for
the load.
Adjust
L6-05 [Torque Detection Level 2]
and
L6-06 [Torque Detection Time 2]
settings.
oL5
Mechanical
Weakening Detection
1
The drive detected overtorque
as specified by the conditions
for mechanical weakening
detection set in
L6-08
[Mechanical Fatigue Detect
Select]
.
Do a deterioration diagnostic test on the
machine side.
oL7
High Slip Braking
Overload
The load inertia is too large.
An external force on the load
side rotated the motor.
Something is preventing
deceleration on the load side.
•
Decrease deceleration times in
C1-02,
C1-04, C1-06, and C1-08
[Deceleration Times]
for applications
that do not use High Slip Braking.
•
Use a braking resistor to decrease the
deceleration time.
The value set in
n3-04 [HSB
Overload Time]
is too small.
•
Increase the value set in
n3-04
.
•
Connect a thermal overload relay to
the motor, and set
n3-04 = 1200 s
(maximum value)
.
oPr
Keypad Connection
Fault
The keypad is not securely
connected to the connector on
the drive.
Examine the connection between the
keypad and the drive.
The connection cable between
the drive and the keypad is
disconnected.
•
Remove the keypad and then
reconnect it.
•
Replace the cable if damaged.
oS
Overspeed
There is overshoot.
•
Decrease
C5-01 [ASR Proportional
Gain 1]
and increase
C5-02 [ASR
Integral Time 1]
.
•
Use
H6-02 to H6-05 [Pulse Train
Input Setting Parameters]
to adjust the
pulse train gain.
There is an incorrect number of
PG pulses set in the drive.
Set
H6-02 [Terminal RP Frequency
Scaling]
to the pulse train frequency
during 100% reference (maximum motor
rotation speed).
The
oS
detection level is set
incorrectly.
Adjust
F1-08 [Overspeed Detection
Level]
and
F1-09 [Overspeed Detection
Delay Time]
.