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YASKAWA
TOEPC71061782C GA800 Drive Installation & Primary Operation
Code
Name
Causes
Possible Solutions
SEr
Speed Search Retries Exceeded
The speed search-related parameters are set
incorrectly.
•
Decrease
b3-10 [Speed Estimation Detection Gain]
.
•
Increase
b3-17 [Speed Est Retry Current Level]
.
•
Increase
b3-18 [Speed Est Retry Detection Time]
.
•
Do Auto-Tuning again.
STPo
Motor Step-Out Detected
The motor code is set incorrectly for PM Control
Methods.
•
Set
E5-01 [PM Motor Code Selection]
correctly as specified by
the motor.
•
For specialized motors, refer to the motor test report and set
E5-
xx
correctly.
SvE
Zero Servo Fault
The value set in the torque limit is too small.
Adjust torque limit-related parameters
L7-01 to L7-04
.
TiM
Keypad Time Not Set
There is a battery in the keypad, but the date and time
are not set.
Use the keypad to set the date and time.
UL3
Undertorque Detection 1
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
UL4
Undertorque Detection 2
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
UL5
Mechanical Weakening Detection 2
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set in
L6-08 [Mechanical Fatigue Detect Select]
.
Examine the machine for deterioration.
Uv1
DC Bus Undervoltage
There is a phase loss in the drive input power.
Correct errors with the wiring for main circuit drive input power.
Uv2
Control Power Undervoltage
The value set in
L2-02 [Power Loss Ride Through
Time]
increased and the momentary power loss
recovery unit is not connected to the drive.
Connect the momentary power loss recovery unit to the drive.
Uv3
Soft Charge Answerback Fault
The relay or contactor on the soft-charge bypass relay
is damaged.
•
Re-energize the drive.
•
If the fault stays, replace the control board or the drive.
•
Check monitor
U4-06 [PreChargeRelayMainte]
shows the
performance life of the soft-charge bypass relay. If
U4-06
is
more than 90%, replace the board or the drive. For information
about replacing the control board, contact Yaskawa or your
nearest sales representative.
◆
Minor Faults/Alarms
This section gives information about the causes and possible solutions when a minor fault or alarm occurs. Use the
information in this table to remove the cause of the minor fault or alarm.
Code
Name
Causes
Possible Solutions
AEr
Station Address Setting Error
The node address for the communication option is not
in the permitted setting range.
•
For CC-Link communication, set
F6-10 [CC-Link Node Address]
correctly.
•
For MECHATROLINK communication, set
F6-20
[MECHATROLINK Station Address]
correctly.
•
For CANopen communication, set
F6-35 [CANopen Node ID
Selection]
correctly.
bAT
Keypad Battery Low Voltage
The keypad battery voltage is low.
Replace the keypad battery.
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.
bCE
Bluetooth Communication Error
The smartphone or tablet with DriveWizard Mobile
installed is too far from the keypad.
Use the smartphone or tablet 10 m (32.8 ft.) or nearer to the keypad.
Note:
bCE
can occur when the smartphone or tablet is 10 m (32.8 ft)
or nearer to the keypad depending on the specifications of the
smartphone or tablet.
Radio waves from a different device are causing
interference with communications between the
smartphone or tablet and keypad.
Make sure that no device around the keypad uses the same radio
bandwidth (2400 MHz to 2480 MHz), and prevent radio
interference.
boL
Braking Transistor Overload
The duty cycle of the braking transistor is high (the
regeneration power or repetition frequency is high).
•
Install a braking unit (CDBR series).
•
Install a regenerative converter.
•
Increase the deceleration time.
bUS
Option Communication Error
The communications cable wiring is incorrect.
Correct wiring errors.
CALL
Serial Comm Transmission Error
The communications cable wiring is incorrect.
Correct wiring errors.
There is a short circuit in the communications cable
or the communications cable is not connected.
•
Repair the short-circuited or disconnected portion of the cable.
•
Replace the defective communications cable.
A programming error occurred on the controller side.
Examine communications at start-up and correct programming
errors.
