
B-63494EN/02 3.SAFETY FUNCTIONS
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Protective
door
Emergency
stop
Servo motor
Spindle
motor
Power-
down
(MCC)
CNC
CPU
Monito
CPU
Spindle
CPU
PSM
SVM
SPM
Safe speed monitoring
Safe speed monitoring
Safe machine position
monitoring
Door lock/
open/close
monitoring
Cross-check
Cross-check
CNC
Dual monitoring of MCC
Dual power-down
Detection of potential cause of error by
MCC off test
I/O, safe speed of the
servo motor, and
machine position are
checked by the CNC
CPU and monitor
CPU in redundant
mode.
The safe speed of
the spindle motor is
checked by the CNC
CPU and spindle
CPU in redundant
m
.
Dual monitoring of protective door state
Protective door
lock signal
Power-down
Dual monitorin
of MCC
Dual monitoring of emergency stop
signal
Safety functions
• Dual monitoring and output of safe-related I/O signals
Emergency stop input, protective door lock/open/close state,
MCC contact state
Output signal for power-down (MCC off), safety speed/safety
position selection signal, programmable safe-related I/O signals
Safety position switch signal
A MCC off Test is required to detect a latent failure.
• Spindle motor
Safe speed monitoring
• Servo motor
Safe speed monitoring
Safe machine position monitoring