146
YASKAWA
TOEPC71061737D GA800 DRIVE INSTALLATION & PRIMARY OPERATION
Code
Name
Causes
Possible Solutions
The parameters are incorrect for the load.
Adjust
L6-02 [Torque Detection Level 1]
and
L6-03 [Torque
Detection Time 1]
settings.
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]
.
•
Adjust the pulse train gain with
H6-02 to H6-05 [Pulse Train
Input Setting Parameters]
.
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]
.
If the drive detects the fault at start or in the low
speed range (10% or less) and
n8-57 = 1 [HFI
Overlap Selection = Enabled]
for PM Control
methods, the high frequency injection gain is too
high.
•
Set
E5-xx [PM Motor Parameters]
correctly or do Rotational
Auto-Tuning.
•
Decrease the value of
n8-41 [HFI P Gain]
in 0.5 unit increments.
Note:
Set
n8-41 > 0.0
for IPM motors.
ov
Overvoltage
The deceleration time is too short and too much
regenerative energy is flowing back into the drive.
•
Set
L3-04 = 1 [Stall Prevention during Decel = General
Purpose]
.
•
Increase the values set in
C1-02, C1-04, C1-06, or C1-08
[Deceleration Times]
.
•
Connect a dynamic braking option to the drive.
•
Perform Deceleration Rate Tuning.
The acceleration time is too short.
•
Make sure that sudden drive acceleration does not cause the
fault.
•
Increase the values set in
C1-01, C1-03, C1-05, or C1-07
[Acceleration Times]
.
•
Increase the value set in
C2-02 [S-Curve Time @ End of Accel]
.
•
Set
L3-11 = 1 [Overvoltage Suppression Select = Enabled]
.
The braking load is too large.
Connect a dynamic braking option to the drive.
There are surge voltages in the input power supply.
Connect a DC link choke to the drive.
Note:
If you turn the phase advancing capacitors ON and OFF and use
thyristor converters in the same power supply system, there can
be surge voltages that irregularly increase the input voltage.
The drive output cable or motor is shorted to ground
(the current short to ground is charging the main
circuit capacitor of the drive through the power
supply).
1.
Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2.
Re-energize the drive.