Mitsubishi Electric C70 Setup Manual page 593

MITSUBISHI CNC
Appendix 2 Explanation of Alarms
Alarm No.
Commanded speed error
56
In C axis control mode, excessive NC commanded speed was detected.(In C axis control mode)
Investigation details
Check the rotation speed displayed on the
spindle drive monitor to see if the C axis
1
rotation speed exceeds 1.15 times of the set
speed during rapid traverse.
Collision detection 1: G0
Alarm No.
When collision detection function (set to SV060) was valid, the disturbance torque in rapid traverse (G0) exceeded the
58
collision detection level.
Investigation details
Check whether the machine has collided
1
during G0 operation.
Collision detection 1: G1
Alarm No.
When collision detection function was valid (SV035.c1G1 was set), the disturbance torque in cutting feed (G1) exceeded
59
the collision detection level.
Investigation details
Check whether the machine has collided
1
during G0 operation.
Alarm No.
Collision detection 2
5A
When collision detection function was valid, the command torque reached the max. motor torque.
Investigation details
1 Check whether the machine has collided.
Check whether the current value on the NC
2 Servo Monitor screen is saturated during
acceleration/deceleration.
Can the acceleration/deceleration time
3
constant be changed?
Alarm No.
Safety observation: Commanded speed error
5B
In safety monitoring mode, the commanded speed was detected to exceed the safe speed.
Investigation details
Check the commanded speed on the NC
1
side.
Safety observation: Door state error
Alarm No.
In safety monitoring mode, the door state signal from the NC and the same signal from the drive unit don't match.
5D
Otherwise, door open state was detected in normal mode.
Investigation details
1 Check the DI input timing.
576
Investigation results
Exceed.
Not exceed.
Investigation results
A collision has occurred at the table, turret
or spindle head in the machine during
movement.
There is no collision at the table, turret and
spindle head in the machine during
movement
Investigation results
The machine has collided during
movement.
The machine has not collided.
Investigation results
The machine has collided.
The machine has not collided.
The current is saturated during acceleration/
deceleration.
The current value during acceleration/
deceleration is appropriate.
The constant can be changed.
The constant cannot be changed.
Investigation results
The commanded speed and safe speed
limit value are the same.
The commanded speed is slower than the
safe speed.
Investigation results
Both NC side and drive unit side input
timings match one another within 500ms.
NC side and drive unit side inputs do not
match one another within 500ms.
Remedies
Increase the rapid traverse time constant.
Remedies
Check the machining program and soft limit
settings.
Adjust the tolerable disturbance torque
SV060.
(Note) Set the detection level to be 1.5 times
or more of the maximum torque.
Remedies
Check the machining program and soft limit
settings.
Increase the detection level (SV035. clG1).
G1 collision detection level
=SV060 × c1G1(001 to 111)
(Note) Set the detection level larger than the
maximum cutting load.
Remedies
Check the machining program and soft limit
settings.
Check the investigation item No. 2.
Check the investigation item No. 3.
Investigate the cause of the load fluctuation.
Increase the acceleration/ deceleration time
constant.
Set to ignore collision detection method 2.
Remedies
Reduce the commanded speed on the NC
side or increase the safe speed limit value.
Replace the drive unit.
Remedies
Review the DI input sequence.
Check if the cable for the DI input signal is
broken.
Investigate the wiring and connection
environment.
SV SP
SV SP
SV SP
SV SP
SV SP
SV SP