YASKAWA GA800 Technical Reference page 387

Code Name
Note:
• The drive detects this error if there is a short circuit or ground fault on the drive output side, or an IGBT failure.
• Do a Fault Reset to clear the fault.
Code Name
SCF Safety Circuit Fault
Note:
Do a Fault Reset to clear the fault.
Code Name
SEr Speed Search Retries Exceeded
Note:
• The drive detects this error if the number of speed search restarts is more than b3-19 [Speed Search Restart Attempts].
• Do a Fault Reset to clear the fault.
Code Name
STPo Motor Step-Out Detected
Note:
Do a Fault Reset to clear the fault.
Code Name
SvE Zero Servo Fault
Note:
• The drive detects this error if motor rotation position moves during Zero Servo.
• Do a Fault Reset to clear the fault.
Code Name
TiM Keypad Time Not Set
Note:
• Do a Fault Reset to clear the fault.
• Parameter o4-24 [bAT Detection Selection] enables and disables TiM detection.
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
Causes
When A1-02 = 5, 6, 7 [Control Method Selection =
OLV/PM, AOLV/PM, or CLV/PM], the output current
is more than the value set in L8-27 [Overcurrent
Detection Gain].
Causes
The safety circuit is broken.
Causes
The speed search-related parameters are set
incorrectly.
The motor is coasting in the opposite direction of the
Run command.
Causes
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.
Causes
The value set in the torque limit is too small.
The load torque is too large.
Noise interference along the encoder cable
Causes
There is a battery in the keypad, but the date and time
are not set.
Possible Solutions
Set L8-27 correctly.
Possible Solutions
Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
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].
Possible Solutions
• 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.
Possible Solutions
Adjust torque limit-related parameters L7-01 to L7-04.
Decrease the load torque.
Isolate the encoder cable from the drive output line or a different
source of electrical interference.
Possible Solutions
Use the keypad to set the date and time.
7.4 Fault
7
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