4. STARTUP
4 - 7
4.2.2 Stop
If any of the following situations occurs, the servo amplifier suspends the running of the servo motor and
brings it to a stop. Refer to section 3.10 for the servo motor with an electromagnetic brake.
Operation/command Stopping condition
Switch of SON (Servo-on). The base circuit is shut off and the servo motor coasts.
Alarm occurrence The servo motor decelerates to a stop with the command. With some alarms,
however, the dynamic brake operates to bring the servo motor to a stop. (Refer to
chapter 8. (Note))
EM2 (Forced stop 2) off The servo motor decelerates to a stop with the command. [AL. E6 Servo forced stop
warning] occurs. EM2 has the same function as EM1 in the torque control mode.
Refer to section 3.5 for EM1.
STO (STO1, STO2) off The base circuit is shut off and the dynamic brake operates to bring the servo motor to
a stop.
LSP (Forward rotation stroke end) of LSN
(Reverse rotation stroke end) off
It will bring the motor to a sudden stop and make it servo-locked. It can be run in the
opposite direction.
Note. Only a list of alarms and warnings is listed in chapter 8. Refer to "MELSERVO-J4 Servo Amplifier Instruction Manual
(Troubleshooting)" for details of alarms and warnings.
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