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2. Wiring and Connection
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(2) Operation sequences of CN23 external emergency stop function
If only external emergency stop is input when external emergency stop valid is set in the
parameters (the emergency stop is not input in NC), 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 NC within 30 seconds after the external
emergency stop is input, the power supply unit outputs contactor shutoff signal (MC1), and then it
shuts off the contactors, and a power supply error (alarm 6F) is detected simultaneously. If the
emergency stop is input from NC within 30 seconds, the warning EA replaces the "In NC
emergency stop" (warning E7). A normal emergency stop status will result if the contactor shutoff
command from the NC 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 power supply error (alarm 6F) will occur after 30 seconds.
OFF
ON
External emergency stop input
(EMGX)
Servo drive unit status display
Contactor control terminal (MC)
ON
OFF
Motor speed
0
OFF
ON
Main emergency stop input
(EMG)
dx E7 EA
Deceleration control
Contactor control command
ON
OFF
Cx
→
dx
External emergency stop input sequences
OFF
ON
ON
OFF
0
OFF
ON
dx 6F, E7 EA
Dynamic brake
ON
OFF
The communication line enters an
emergency stop state by the output
from the servo.
0 30
Time (s)
External emergency stop input
(EMGX)
Servo drive unit status display
Contactor control terminal (MC)
Motor speed
Main emergency stop input
(EMG)
Contactor control command
When neither a main emergency stop nor contactor shutoff command is input