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3 Safety Function
MITSUBISHI CNC
(2) Operation sequences of emergency stop
[1] Operation sequences of normal emergency stop
If the normal NC emergency stop and the external emergency stop are simultaneously input, the operation
sequence will be the same as in the case of using only the NC emergency stop.
Immediately after the emergency stop is input, deceleration control is carried out in spindle control, and
dynamic brake stop in servo control in a standard case, or deceleration control when the parameter is set. The
ready signal is turned OFF after the NC confirms all axes stop, and the contactor control axis turns the
contactor OFF.
Even when the NC emergency stop signal and the external emergency stop signal are not simultaneously
input, the operation sequence will be the same as that of the normal emergency stop provided that both
signals are input before all axes stop.
ON
OFF
0
ON
OFF
dx
Cx→dx
E7
NC
Emergency stop input (EMG)
External emergency stop
input (EMGX)
Motor break control output
(MBR)(Servo only)
Motor speed
Contactor control output (MC)
Drive unit status display
Operation sequences of normal emergency stop
ON
Cancel
ON
Cancel
Cancel
ON
Ready signal (RDY)
Contactor control command
NC confirms
all axes stop
Deceleration control, or dynamic brake stop