Mitsubishi Electric M700VS Series Setup Manual page 565

MITSUBISHI CNC
Appendix 2 Explanation of Alarms
Y20 Parameter compare error 0001 (Axis name)
Details
The speed monitoring parameter in the NC does not correspond to the parameter transmitted to the
drive unit.
The name of the axis with an error is displayed.
Remedy
The NC or the servo drive unit may be damaged.
Contact the service center.
Y20 Sfty obsrvation: Cmd spd err 0002 (Axis name)
Details
The speed exceeding the speed set with the parameter was commanded during the speed monitoring
mode.
The name of the axis with an error is displayed.
Remedy
Check the speed monitoring parameter and the sequence program.
Restart the NC.
Y20 Sfty obsrvation: FB pos err 0003 (Axis name)
Details
The commanded position, transmitted to the servo drive unit from NC, is totally different from the
feedback position received from the servo drive unit during the speed monitoring mode.
The name of the axis with an error is displayed.
Remedy
The NC or the servo drive unit may be damaged.
Contact the service center.
Y20 Sfty obsrvation: FB speed err 0004 (Axis name)
Details
Actual rotation speed of the motor is exceeding the speed that has been set with speed monitoring
parameter during the speed monitoring mode.
The name of the axis with an error is displayed.
Remedy
Correct the speed observation parameter and the sequence program.
Restart the NC.
Y20 Door signal: Input mismatch 0005 Door No.
Details
Door state signals on the NC side and the drive side do not match. It may be caused by the followings:
- Cable disconnection
- Damaged door switch
- Damaged NC or servo drive unit
Remedy
Check the cable.
Check the door switch.
Restart the NC.
Y20 No speed observation mode in door open 0006 Door No.
Details
The door open state was detected when the speed monitoring mode was invalid.
The causes may be same as the ones for 0005 (Door signal: Input mismatch). Also the sequence
program may not be correct.
Remedy
Correct the sequence program.
Restart the NC.
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