
3. TROUBLESHOOTING AND
B-65235EN/02 TROUBLESHOOTING AND RECOVERY RECOVERY PROCEDURES
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3.3.2
Overload Alarm
(1) Make sure that the motor is not vibrating.
If a motor vibrates, the current flowing in it becomes
more than necessary, resulting in an alarm.
(2) Make sure that the power line to the motor is
connected correctly.
If the connection is incorrect, an abnormal current
flows in the motor, resulting in an alarm.
(3) Make sure that the following parameters are setted
correctly.
An overload alarm is issued based on the result of
calculation of these parameters. Be sure to set them to
the standard values.
2062 8X62 Overload protection coefficient (OVC1)
2063 8X63 Overload protection coefficient (OVC2)
2065 8X65 Overload protection coefficient (OVCLMT)
(4) Attach the check board (A06B-6071-K290) to connector
JX5 to measure the waveform of the actual current (IR
and IS) of the servo amplifier unit. Start the motor
and measure the actual current (IR and IS).
– If the actual current exceeds 1.4 times the rated
current, the constant for the acceleration/
deceleration duration is too small, or the load on
the machine is too heavy for the capacity of the
motor.
– If the actual current exceeds 1.4 times the rated
current during normal operating, the load on the
machine is too heavy for the capacity of the
motor.
3.3.3
Feedback Disconnected Alarm
This alarm is detailed with alarm 1 and 2 on the servo
adjustment screen( Subsec. 3.3.1).
Alarm 1 Alarm 2
#7 #2 Alarm details #7 #4
01
CM alarm (α pulse coder)
11
0 1 Pulse coder disconnected (soft ware) 0 0
0 1 Separate pulse coder disconnected
(hard ware)
11
For the CM alarm, go to Subsec 3.3.7.
For soft ware disconnected, go to(1).
For hard ware disconnected, go to(3).