External Emergency Stop Operation Sequence - Mitsubishi Electric MELDAS MDS-R Series Technical Specification And Instruction Manual

7-9-3 External emergency stop operation sequence

If only an external emergency stop is input when "external emergency stop valid" is set (the main
emergency stop is not input), "In external emergency stop state" (warning EA) will be detected. Then,
the system will enter the emergency stop state.
If a contactor shutoff command is not issued from the NC unit within 30 seconds after the external
emergency stop is input (if the main emergency stop is not input), an external emergency stop error (alarm
55) is detected. If the main emergency stop is input within 30 seconds, the warning EA changes to the "In
NC emergency stop state" (warning E7). The normal emergency stop status (warning E7) will result.
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 output (MC)
Servo drive unit status display
External emergency stop input
(EMGX)
Main emergency stop input
(EMG)
Motor speed
Contactor control output (MC)
Servo drive unit status display
7. Wiring and Connection
OFF
ON
OFF
ON
Deceleration control
0
ON
dx EA
OFF
External emergency stop input sequences
OFF
ON
OFF
ON
Deceleration control
0
ON
dx
OFF
When main emergency stop is not input
7 - 22
E7
EA (30s)
Cx → dx
55