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7 Troubleshooting
MITSUBISHI CNC
(Note 1) Definitions of terms in the table are as follows.
Main side encoder: Encoder connected to CN2 Sub side encoder: Encoder connected to CN3
(Note 2) Resetting methods
NR: Reset with the NC RESET button. This alarm can also be reset with the PR and AR resetting conditions.
PR: Reset by turning the NC power ON again. This alarm can also be reset with the AR resetting conditions.
When the control axis is removed, this alarm can be reset with the NC RESET button. (Excluding alarms 32 and 37.)
AR: Reset by turning the servo drive unit power ON again.
No. Name Details
Reset
method
Servo
stop method
Spindle
stop method
54 Excessive error 3
There was no motor current feedback when the alarm
"Excessive error 1" was detected.
NR Dynamic stop Coast to a stop
56 Commanded speed error
In the C-axis control mode, excessive speed error was
detected.
NR - Deceleration stop
58 Collision detection 1: G0
A disturbance torque exceeded the allowable value in rapid
traverse modal (G0).
NR
Maximum capacity
deceleration stop
-
59 Collision detection 1: G1
A disturbance torque exceeded the allowable value in the
cutting feed modal (G1).
NR
Maximum capacity
deceleration stop
-
5A Collision detection 2
A current command with the maximum drive unit current value
was detected.
NR
Maximum capacity
deceleration stop
-
5B
Safely limited: Commanded
speed monitoring error
A commanded speed exceeding the safely limited speed was
detected in the safely limited mode.
PR Deceleration stop Deceleration stop
5D Safely limited: Door state error
The door state signal input in the NC does not coincide with the
door state signal input in the drive unit in the safely limited
mode. Otherwise, door open state was detected in normal
mode.
PR Deceleration stop Deceleration stop
5E
Safely limited: Speed feedback
monitoring error
A motor speed exceeding the safely limited speed was
detected in the safely limited mode.
PR Deceleration stop Deceleration stop
5F External contactor error A contact of the external contactor is welding. NR Deceleration stop Deceleration stop
60
to
77
Power supply alarm
The power supply unit detected an error.
The error details are different according to the connected power supply
unit. Refer to "Power supply alarm" for details.
Dynamic stop Coast to a stop
80 Main side encoder cable error
The cable type of the motor side encoder cable is for
rectangular wave signal.
AR Initial error -
81 Sub side encoder cable error
The cable type of the machine side encoder cable does not
coincide with the encoder type which is set by the parameter.
AR Initial error -
87 Drivers communication error The communication frame between drive units was aborted. PR Dynamic stop Coast to a stop
88 Watchdog The drive unit does not operate correctly. AR Dynamic stop Coast to a stop
8A
Drivers communication data
error 1
The communication data 1 between drivers exceeded the
tolerable value in the communication between drive units.
PR Dynamic stop Coast to a stop
8B
Drivers communication data
error 2
The communication data 2 between drivers exceeded the
tolerable value in the communication between drive units.
PR Dynamic stop Coast to a stop