YASKAWA CIPR-GA50UВ001AJ Series Installation & Primary Operation page 139

Code Name
Speed Search Retries
SEr
Exceeded
Motor Step-Out
STPo
Detected
TiM Keypad Time Not Set
Undertorque
UL3
Detection 1
YASKAWA TOEPC7106170YB YASKAWA AC Drive GA500 Installation & Primary Operation
Causes
The speed search-related
parameters are set incorrectly.
The motor is coasting in the
opposite direction of the Run
command.
The motor code is set
incorrectly for PM Control
Methods.
The load is too large.
The load inertia is too large.
The acceleration/deceleration
times are too short.
Speed response is too slow.
There is a battery in the keypad,
but the date and time are not set.
A fault occurred on the
machine.
Example: There is a broken
pulley belt.
The parameters are incorrect for
the load.
15 Troubleshooting
Possible Solutions
• 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.
Set b3-14 = 1 [Bi-directional Speed
Search = Enabled].
• 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.
• Increase the value set in n8-55 [Motor
to Load Inertia Ratio].
• Increase the value set in n8-51 [Pull-
in Current @ Acceleration]. If the
drive detects STPo during
deceleration when increasing the
value set in n8-51, set the value of n8-
79 [Pull-in Current @ Deceleration]
lower than n8-51.
• Decrease the load.
• Replace the drive and motor with
larger capacity models.
Increase the value set in n8-55.
• Increase the values set in C1-01 to
C1-08 [Acceleration/Deceleration
Times].
• Increase the value set in C2-01 [S-
Curve Time @ Start of Accel].
Increase the value set in n8-55.
Use the keypad to set the date and time.
Examine the machine and remove the
cause of the fault.
Adjust L6-02 [Torque Detection Level 1]
and L6-03 [Torque Detection Time 1]
settings.
139