Instructions On Startup; Troubleshooting At Startup - Mitsubishi Electric MELSERVO-J5 Series User Manual

4.2

Instructions on startup

Instructions for power-on
• When the absolute position detection system is used in a rotary servo motor, [AL. 025 Absolute position erased] occurs the
first time that the power is turned on and the servo motor cannot be changed to servo-on status. Shut off the power once,
then cycle the power to deactivate the alarm.
• If the power is turned on while the servo motor is being rotated by an external force, an alarm may occur. Make sure that
the servo motor is not operating before turning on the power. In addition, refer to the manual for the servo motor or encoder
being used.
Stop
If any of the following situations occur, the servo amplifier suspends and stops the operation of the servo motor. If the servo
motor is operated by the network command, the servo motor may be stopped by the controller command.
Operation/command
Alarm occurrence
EM2 (Forced stop 2) off
STO (STO1 and STO2) off
Limit switch off
Instructions for network disconnection
To turn off the system power and disconnect the servo amplifier from the network, specific procedures may be required. For
details, refer to "Disconnecting the network" in the following manual.
MR-J5-G-N1/MR-J5W-G-N1 User's Manual (Communication Function)
4.3

Troubleshooting at startup

Investigation by using MR Configurator2.
The reason that the servo motor does not rotate can be investigated via MR Configurator2.
The cause that the servo motor fails to rotate is acquired from the servo amplifier of the target axis, and displayed on "No
Motor Rotation". The window will remain blank when no cause exists. "- - - -" is displayed when off-line or the cause cannot be
acquired.
Stopping condition
The servo motor decelerates to a stop. There are also alarms that activate and stop the dynamic brake. Refer to the
following for the details of alarms.
MR-J5 User's Manual (Troubleshooting)
The servo motor decelerates to a stop. [AL. 0E6 Servo forced stop warning] occurs. In the torque mode, EM2 functions the
same as EM1.
The base circuit is shut off and the dynamic brake operates to stop the servo motor.
If LSP (Forward rotation stroke end), LSN (Reverse rotation stroke end), FLS (Upper stroke limit), or RLS (Lower stroke
limit) is turned off, the servo motor will stop slowly and become in the servo-lock state. Operation in the opposite direction
is possible.
4 STARTUP
4.2 Instructions on startup
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