External Emergency Stop Operation Sequences - Mitsubishi Electric MELDAS MDS-B-SVJ2 Series Specifications And Instruction Manual

2-9-2 External emergency stop operation sequences

If only an external emergency stop is input when external emergency stop valid is set in the
parameters (the main emergency stop is not input), 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 SVJ2 itself shuts off the contactors, and an external emergency stop
error (alarm 55) is detected. If the main emergency stop is input within 30 seconds, the warning EA
replaces the "In CNC emergency stop" (warning E7). A normal emergency stop status (warning E7)
will result if contactor shutoff commands from the CNC are further input.
Ready ON is possible even if 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 output
(MC)
Servo amplifier status
display
External emergency stop
input (EMGX)
Main emergency stop input
(EMG)
Motor speed
Contactor control
command
Contactor control output
(MC)
Servo amplifier status
display
When neither a main emergency stop nor contactor shutoff command is input
Chapter 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
2-33
Deceleration control
E7
EA
30
Cx → dx
The bus line enters an
emergency stop state by the
output from the servo.
Dynamic brake
55 ， E7
Time （ sec ）