Operation Sequences Of Cn23 External Emergency Stop Function - Mitsubishi MELDAS MDS-C1 Instruction Manual

2-11-2 Operation sequences of CN23 external emergency stop function

If only CN23, an external emergency stop, is input when external emergency stop valid is set in the
parameters (the emergency stop is not input in CNC), an "In external emergency stop" (warning EA) will
be detected. At this time, the system itself does not enter an emergency stop status. (There will be no
deceleration control or dynamic brake stop).
If a contactor shutoff command is not issued from the CNC within 30 seconds after the external
emergency stop is input, the power supply unit itself outputs contactor shutoff signal (MC1), and then it
shuts off the contactors, and an external emergency stop error (alarm 55) is detected. If the emergency
stop is input from CNC within 30 seconds, the warning EA replaces the "In CNC emergency stop"
(warning E7). A normal emergency stop status (warning E7) will result if the contactor shutoff command
from the CNC are further input.
Ready ON is possible even if CN23, an external emergency stop has been input when the emergency
stop is canceled, but an external emergency stop error (alarm 55) will occur after 30 seconds.
External emergency stop input
(EMGX)
Main emergency stop input
(EMG)
Motor speed
Contactor control command
Contactor control terminal (MC)
Servo drive unit status display
External emergency stop input
(EMGX)
Main emergency stop input
(EMG)
Motor speed
Contactor control command
Contactor control terminal (MC)
Servo drive unit status display
When neither a main emergency stop nor contactor shutoff command is input
2. Wiring and Connection
OFF
ON
OFF
ON
0
ON
OFF
ON
OFF
dx EA
External emergency stop input sequences
OFF
ON
OFF
ON
0
ON
OFF
ON
OFF
dx
0
2 - 45
Deceleration control
E7
The communication line enters an
emergency stop state by the output
from the servo.
EA
30
Cx → dx
Dynamic brake
55, E7
Time (s)