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3 Safety Function
MITSUBISHI CNC
[4] Related alarm and warning
If the dual signal error (4D) or dual signal warning (A4) occurs, the alarm, axis name and sub-number that
indicates the detected factor will appear on the NC Diagnosis screen as shown below:
S05 Safety function error ○○○○ □
○○○○ : Alarming factor (hexadecimal)
□ : Axis name
S53 Safety function warning ○○○○ □
○○○○ : Warning factor (hexadecimal)
□ : Axis name
When dual signal error 4D occurs, eliminate the factor of illegal parameter setting or STO signal input by
referring to the following.
In addition, while the power is shut off by STO signal, dual signal warning A4 is detected regardless of SV113/
bit8 or SP229/bit8 setting.
< Sub-number for dual signal error (4D) >
(Note 1) Resetting methods
NR: Reset with the NC RESET button.
(Note 2) Dedicated wiring STO function is determined with the parameter (SV113:SSF8/bit8 for servo and SP229:SFNC9/bit8 for spindle) setting.
< Sub-number for dual signal warning (4D) >
(Note 1) Resetting methods
* : Automatically reset once the cause of the warning is removed.
(Note 2) Warning A4 is detected regardless of SV113/bit8 or SP229/bit8 setting while the power is shut off by STO signal.
Sub-No. Name Details
Reset
method
Stop method
0001 Power shutoff error
- The parameter setting for dedicated wiring STO function
(SV113/bit8 or SP229/bit8) is wrong.
- The connector to disable STO is not installed correctly
when not using dedicated wiring STO function.
NR
Servo:
Dynamic stop
Spindle:
Coast to a stop
0002 Illegal power shutoff error STO signal is input by dedicated wiring STO function during servo ON.
0004
STO signal mismatch
error at servo OFF
STO signal is illegally input by dedicated wiring STO function during servo OFF.
(Illegal input : Signal input state for STO1 and STO2 is mismatched.)
0006
STO signal mismatch
error at servo ON
STO signal is illegally input by dedicated wiring STO function during servo ON.
(Illegal input : Signal input state for STO1 and STO2 is mismatched.)
Sub-No. Name Details
Reset
method
Stop method
0001 During STO signal shutoff STO signal is normally input and the power is shut off. * -