YASKAWA SGM-A3 User Manual page 414

INSPECTION, MAINTENANCE, AND TROUBLESHOOTING
6.2.1 Troubleshooting Problems with Alarm Display cont.
6
402
D Display and Outputs
Digital Operator g p
Di Display and l d
Alarm Name Alarm Name
ALO1
A.85
OFF
Absolute encoder
overspeed (only if
absolute encoder
is used)
Status When Alarm Occurred
At control power ON
Cn-01 Bit 1 = 0
Cn-01 Bit 1 = 1
Position control
Cause
A Absolute encoder turned ON at a speed
exceeding 400 r/min.
B Circuit board (1PWB) defective
D Display and Outputs
Digital Operator g p
Display and Di l d
Alarm Name Alarm Name
ALO1
A.b1
OFF
Reference input
read error (for
speed/torque
control only)
Alarm Output
Alarm Code Output
ALO2
OFF OFF
When SEN signal turned
ON, Cn-01 Bit 1 = 0
B
A
A
Turn ON encoder power supply (or SEN
signal or Servopack control power supply)
at a speed not exceeding 400 r/min.
Replace Servopack.
Alarm Output
Alarm Code Output
ALO2
OFF OFF
Alarm Output p
ALO3
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON
A
Remedy
Alarm Output p
ALO3
OFF
OFF: Output transistor is OFF
ON: Output transistor is ON