[Al. 09B_Excessive Error Warning] - Mitsubishi Electric Melservo-J5 MR-J5 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 is enabled.
5.
A moving part collided against the machine.
6.
Insufficient torque
7.
Power supply voltage has dropped.
8.
Acceleration/deceleration time constant is
insufficient.
9.
The position control gain is small.
10.
The servo motor shaft was rotated by external
force. The moving part of the linear servo
motor was moved by external force.
11.
The encoder or linear encoder is
malfunctioning.
[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 "Connection example of power supply circuit" in the following manual.
MR-J5 User's Manual (Hardware)
Check if the encoder cable is connected correctly.
When torque is limited, increase the torque limit value.
Review the operation pattern to avoid collision.
Check the peak load ratio, and if the torque is saturated, reduce the load or
review the operation pattern. Otherwise, replace the servo motor with a larger-
capacity servo motor.
If the bus voltage is low, review the power supply voltage and power supply
capacity.
Set a longer acceleration/deceleration time constants, and then check the
repeatability.
Increase the value of [Pr. PB08 Position control gain].
Measure the actual position under the servo-lock status.
When an external force rotates the servo motor or moves the linear servo
motor, review the machine.
Replace the servo motor or linear encoder.
Check/action method
Do not input a command when the torque limit value is 0.
Model
[A]
[G]
[WG]
Model
[A]
[G]
[WG]