Mitsubishi Electric MELSERVO-J4 Series Instruction Manual page 504

■State transition of the servo amplifier display (3-digit, 7-segment LED) at the magnetic pole
detection
When the magnetic pole detection with MR Configurator2 is normally executed, the servo amplifier display (3-digit, 7-segment
LED) shows the state as follows.
During the
magnetic
Servo-off status pole detection
The decimal point blinks.
Preparation for the magnetic pole detection
When the test operation mode is selected with the test operation select switch (SW1-1), the network
communication for the servo amplifier and later shut off.
For the magnetic pole detection, use the test operation mode (positioning operation) of MR Configurator2. Turn off the servo
amplifier power, and set the test operation select switch (SW1-1) as shown below. Turning on the power enables the test
operation mode.
ON
1 2
Operation at the magnetic pole detection
WARNING
• Note that the magnetic pole detection automatically starts simultaneously with the turning-on of the servo-on command.
CAUTION
• If the magnetic pole detection is not executed properly, the direct drive motor may operate unexpectedly.
• Establish the machine configuration to use LSP (Forward rotation stroke end) and LSN (Reverse rotation
stroke end). The machine may be damaged due to a collision without LSP and LSN.
• Assign LSP and LSN and perform the magnetic pole detection also in the torque mode.
• At the magnetic pole detection, whether the motor rotates in the forward or reverse direction is
unpredictable.
• Depending on the setting value of [Pr. PL09 Magnetic pole detection voltage level], an overload,
overcurrent, magnetic pole detection alarm, or others may occur.
• When performing the positioning operation from a controller, use the sequence which confirms the normal
completion of the magnetic pole detection and the servo-on status, then outputs the positioning command. If
the controller outputs the positioning command before RD (Ready) turns on, the command may not be
accepted or an alarm may occur.
• After the magnetic pole detection, check the positioning accuracy with the test operation (positioning
operation function) of MR Configurator2.
• The accuracy of the magnetic pole detection improves with no load.
15 USING A DIRECT DRIVE MOTOR
502
15.3 Operation and functions
Magnetic pole
detection
completed
(Servo-on status)
ON
1 2
Set SW1-1 to "ON (up)".