Precautions [G] [A]; Precautions [B] - Mitsubishi Electric MELSERVO MR-J5 Series User Manual

Precautions [G] [A]

Even when using a servo motor with battery-less absolute position encoder, absolute position data is erased under the
following conditions. If the absolute position data is erased, perform homing again.
• The servo motor or servo amplifier is replaced.
• The incremental system is enabled.
• [Pr. PA01 Operation mode selection] is changed.
• [AL. 025 Absolute position erased] occurs.
• [AL. 0E3 Absolute position counter warning] occurs.
• [AL. 02B Encoder counter error] occurs.
Connecting a servo motor other than the one with a batteryless absolute position encoder that was connected at the startup of
the absolute position detection system triggers [AL. 01A Servo motor combination error]. In such cases, reconnect the servo
motor that was connected at the startup of the absolute position detection system to operate without losing the absolute
position data. When replacing a servo motor, refer to the following.
Page 417 Procedure of replacing a servo motor with battery-less absolute position encoder
When [Pr. PF63.0 [AL. 01A.5 Servo motor combination error 3] selection] is "1" (disabled), connecting a servo motor that had
not been connected at the startup of the absolute position detection system will cause [AL. 025 Absolute position erased],
erasing absolute position data.
Therefore, check if a correct servo motor is connected.

Precautions [B]

Even when using a servo motor with battery-less absolute position encoder, absolute position data is erased under the
following conditions. If the absolute position data is erased, the homing request signal turns on on the controller side. Perform
homing again.
• The servo motor or servo amplifier is replaced.
• [AL. 025 Absolute position erased] occurs.
• [AL. 0E3 Absolute position counter warning] occurs.
• [AL. 02B Encoder counter error] occurs.
• The servo amplifier with the absolute position data is used as a slave axis of the master-slave operation function.
For the conditions for the homing request signal to be turned on due to controller factors, refer to each controller manual.
Connecting a servo motor other than the one with a batteryless absolute position encoder that was connected at the startup of
the absolute position detection system triggers [AL. 01A Servo motor combination error]. In such cases, reconnect the servo
motor that was connected at the startup of the absolute position detection system to operate without losing the absolute
position data. When replacing a servo motor, refer to the following.
Page 417 Procedure of replacing a servo motor with battery-less absolute position encoder
When [Pr. PF63.0 [AL. 01A.5 Servo motor combination error 3] selection] is "1" (disabled), connecting a servo motor that had
not been connected at the startup of the absolute position detection system will cause [AL. 025 Absolute position erased],
erasing absolute position data.
Therefore, check if a correct servo motor is connected.
7 ABSOLUTE POSITION DETECTION SYSTEM
7
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7.1 Outline