Specifications

I Alarms
MCP Alarms (Y)
I - 34
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 mon-
itoring 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 se-
quence program may not be correct.
Remedy
Correct the sequence program.
Restart the NC.
Y20 Speed obsv: Para incompatible 0007 (Axis name)
Details
Two speed monitoring parameters are not matched at the rising edge of the "speed monitor
mode" signal.
The name of the axis with an error is displayed.
Remedy
Correct the relevant parameters so that the two speed monitoring parameters match.
Restart the NC.
Y20 Contactor welding detected 0008 Contactor No.
Details
Contactor welding was detected.
Displays the bit corresponding to the No. of the abnormal contactor.
Some contactors take a while to be shutdown after the servo ready is turned OFF, and the
servo ready was turned ON in the meantime.
Remedy
- Make sure that contactor's auxiliary B contact signal is output correctly to the device set on
"#1330 MC_dp1(Contactor weld detection device 1)" and "#1331 MC_dp2(Contactor weld
detection device 2)".
- If welding, replace the contactor.
- Restart the NC.
Y20 No spec: Safety observation 0009
Details
“#2313 SV113 SSF8/bitF (ssc SLS (Safely Limited Speed) function)” and “#13229 SP229
SFNC9/bitF (ssc SLS (Safely Limited Speed) function)” are set for a system with no safety ob-
servation option.
Remedy
Disable “#2313 SV113 SSF8/bitF (ssc SLS (Safely Limited Speed) function)” and “#13229
SP229 SFNC9/bitF (ssc SLS (Safely Limited Speed) function)”.
Then, restart the NC.