3.7 I/O Signals
47
3.7.3 Emergency Stop Signal Input
The usual connection for emergency stop signal input E-STP is shown below. When the signal turns
OFF while the servomotor is rotating, the servomotor will be stopped by the dynamic brake.
Note: For the emergency stop signal, the SERVOPACK processing for stopping is exe-
cuted by the software. As the safety specifications of some applications may not
satisfy local safety requirements, add external safety circuits as required.
• The command warning 1 (A.95A) will occur if a SV_ON command is sent while the SERVOPACK is in
emergency stop status.
• The emergency stop alarm (A.280) will occur if the emergency stop signal turns ON while the power is
being supplied to the servomotor.
• Use the emergency stop signal input E-STP to forcibly turn OFF the servo from an external
sequence, such as host controller, at occurrence of servo alarm or system emergency stop.
The residual voltage rotates the servomotor for a few seconds after the power supply has been
turned OFF, and may result in injury or damage to the equipment. Be sure to completely stop the
motor by turning OFF the servo using the emergency stop.
• When executing the JOG operation and the home position search operation using CX-Drive, the E-
STP signal will be ignored. Alternative measures must be taken in case an emergency stop is
needed.
Signal Name
Signal
Function
Emergency Stop
Signal Input
E-STP
ON (low level)
Releases the emergency stop.
OFF (high level)
Emergency stop (Forced servo OFF)
WARNING
+24VIN
S
ERVOPACK
3
.
3
k
Ω
Photo-
co
u
pler
E-
S
TP
7 mA
0V
24-VDC
power
su
pply
24V
CN1-5
CN1-6
Emergency
s
top
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