Startup In Position Control Mode; Power On And Off Procedures; Stop - Mitsubishi Electric Melservo MR-J3-A Instruction Manual

4. STARTUP

4.2 Startup in position control mode

Make a startup in accordance with section 4.1. This section provides the methods specific to the position
control mode.

4.2.1 Power on and off procedures

(1) Power-on
Switch power on in the following procedure. Always follow this procedure at power-on.
1) Switch off the servo-on (SON).
2) Make sure that a command pulse train is not input.
3) Switch on the main circuit power supply and control circuit power supply.
At power-on, "88888" appears instantaneously, but it is not an error.
When main circuit power/control circuit power is switched on, the display shows "C (Cumulative
feedback pulses)", and in two second later, shows data.
In the absolute position detection system, first power-on results in the absolute position lost
(AL.25) alarm and the servo system cannot be switched on.
The alarm can be deactivated then switching power off once and on again.
Also in the absolute position detection system, if power is switched on at the servo motor speed of
3000r/min or higher, position mismatch may occur due to external force or the like. Power must
therefore be switched on when the servo motor is at a stop.
(2) Power-off
1) Make sure that a command pulse train is not input.
2) Switch off the Servo-on (SON).
3) Switch off the main circuit power supply and control circuit power supply.

4.2.2 Stop

In any of the following statuses, the servo amplifier interrupts and stops the operation of the servo motor:
Refer to section 3.11.3 for the servo motor equipped with electromagnetic brake.
(a) Servo-on (SON) OFF
The base circuit is shut off and the servo motor coasts.
(b) Alarm occurrence
When an alarm occurs, the base circuit is shut off and the dynamic brake is operated to bring the servo
motor to a sudden stop.
(c) Emergency stop (EMG) OFF
The base circuit is shut off and the dynamic brake is operated to bring the servo motor to a sudden stop.
Alarm AL.E6 occurs.
(d) Forward rotation stroke end (LSP), reverse rotation stroke end (LSN) OFF
The droop pulse value is erased and the servo motor is stopped and servo-locked. It can be run in the
opposite direction.
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