[Al. 09B_Excessive Error Warning] - Mitsubishi Electric MR-JET- G Series User Manual

[AL. 09B_Excessive error warning]

• Droop pulses exceeded the warning occurrence level.
[AL. 09B.1_Excessive droop pulse 1 warning]
Cause
1.
The servo motor power cable was
disconnected.
2.
The connection of the servo motor is incorrect.
3.
The connection of the encoder cable is
incorrect.
4.
The torque limit has been enabled.
5.
A moving part collided against the machine.
6.
The torque is insufficient.
7.
The power supply voltage has dropped.
8.
Acceleration/deceleration time constant is
insufficient.
9.
The position control gain is too small.
10.
The servo motor shaft was rotated by an
external force.
11.
The encoder has malfunctioned.
[AL. 09B.3_Excessive droop pulse 2 warning]
Page 70 [AL. 09B.1_Excessive droop pulse 1 warning]
[AL. 09B.4_Excessive error warning during 0 torque limit]
Cause
1.
The torque limit value is 0.
1 SERVO AMPLIFIER TROUBLESHOOTING
70
1.3 Handling methods for alarms/warnings
Check/action method
Repair or replace the servo motor power cable.
Check the U/V/W wiring.
Refer to "Example power circuit connections" in the following manual.
MR-JET User's Manual (Hardware)
Check if the encoder cable is connected correctly.
If the torque has been limited, increase the torque limit value.
Review the operation pattern to avoid collision.
Check the peak load ratio. If the torque is saturated, reduce the load or review
the operation pattern. Alternatively, replace the servo motor with a larger-
capacity servo motor.
If the bus voltage is too low, review the power supply voltage and power supply
capacity.
Set a longer acceleration/deceleration time constant, then check the
repeatability.
Increase the value of [Pr. PB08 Position control gain].
Measure the actual position under the servo-lock status.
If an external force rotates the servo motor, review the machine.
Replace the servo motor.
Check/action method
Do not input a command when the torque limit value is 0.
Model
[JET-G]
Model
[JET-G]