Specifications

I Alarms
MCP Alarms (Y)
I - 35
Y20 SDIO connector input volt err 0010
Details
24VDC power is not supplied to SDIO connector correctly. (SDIO 4A pin supply voltage was
dropped to 16V or less, or 1ms or more instant power interrupt was detected.)
In this case, "Pw sply:Inst pw interpt(DC24V)" alarm occurs because the contactor control out-
put signal cannot be controlled.
This state remains until restarting the NC even if the cause of the alarm has been removed.
Remedy
Check the wiring. Supply 24VDC power to the SDIO connector.
Restart the NC.
Y20 Device setting illegal 0011
Details
- The device set in "#1353 MC_ct1 (Contactor shutoff output 1 device)" does not exist.
- The device set in "#1353 MC_ct1 (Contactor shutoff output 1 device)" is used as an output
device in PLC program.
Remedy
- In "#1353 MC_ct1 (Contactor shutoff output 1 device)", set the device to which a remote I/
O is connected. Use the device to control the contactor.
- Confirm that the devices set by "#1353 MC_ct1 (Contactor shutoff output 1 device)" are not
used as an output device in PLC program.
Y20 Contactor operation abnormal 0012 Contactor No.
Details
Contactor's operation is not following the NC's commands.
Displays the No. of the abnormal contactor.
Remedy
- Check and correct "#1353 MC_ct1 (Contactor shutoff output 1 device)" setting.
- Check the wiring for contactor shutoff.
- Check for contactor's welding.
Y20 STO function operation illegal 0013
Details
The drive unit's STO function has failed to work properly.
Remedy
If this alarm has occurred alone, a drive unit failure can be suspected.
If other alarms have been generated at the same time, it is also possible that there is commu-
nication problem. Check the optical cable wiring.
Y20 STO function illegal at pwr ON 0014
Details
The motor power has not been shut down with the STO function when the NC power was
turned ON.
Remedy
If this alarm has occurred alone, a drive unit failure can be suspected.
If other alarms have been generated at the same time, it is also possible that there is commu-
nication problem. Check the optical cable wiring.
Y20 Dual signal: parameter setting error 0027
Details
A setting of #2118 SscDrSel, #3071 SscDrSelSp, #2180 S_DIN, or #3140 S_DINSp is not cor-
rect.
Remedy
- Correct the parameter setting.
Y20 Safety observation: parameter memory error 0031 (Parameter No.))
Details
The following parameters are not consistent with the check data.
#2180 S_DIN, #3140 S_DINSp
Remedy
- Correct the parameter setting.
- Restore the backup data, as the parameter or check
data may be corrupted.
Y21 Speed obsv signal: Speed over 0001 (Axis name)
Details
The speed exceeds the safety speed limit when the "speed monitor mode" signal is ON.
The name of the axis with an error is displayed.
Remedy
Decelerate the speed to reset the warning and start the speed monitor.
Y51 Parameter G0tL illegal 0001
Details
The time constant has not been set or exceeded the setting range.
Remedy
Correct "#2004 G0tL (G0 time constant (linear))".
Y51 Parameter G1tL illegal 0002
Details
The time constant has not been set or exceeded the setting range.
Remedy
Correct "#2007 G1tL (G1 time constant (linear))".
Y51 Parameter G0t1 illegal 0003
Details
The time constant has not been set or exceeded the setting range.
Remedy
Correct "#2005 G0t1 (G0 time constant (primary delay) / Second-step time constant for soft
acceleration/deceleration)".