Scale Measurement Encoder - Mitsubishi Electric MELSERVO-J3 Series Manual

Part 5: Common Reference Material

6.3.2 Scale measurement encoder

When a rotary encoder is used, an absolute position detection system can be configured by installing the
encoder battery to the servo amplifier. In this case, the battery life will be shorter because the power
consumption is increased as the power is supplied to the two encoders of motor side and load side.
(1) Rotary encoder
When a rotary encoder is used as a scale measurement encoder, use the following servo motor or
synchronous encoder as the encoder.
Servo motor and synchronous encoder that can be used as encoder
Use a two-wire type encoder cable. Do not use MR-EKCBL30M-L, MR-EKCBL30M-H, MR-EKCBL40M-
H, or MR-EKCBL50M-H as they are four-wire type.
When an encoder cable of 30 m to 50 m is needed, fabricate a two-wire type encoder cable according to
"MR-J4-_B_ Servo Amplifier Instruction Manual" or "MR-J4W2-_B Servo Amplifier Instruction Manual".
To use the scale measurement function in the absolute position detection system ([Pr. PA22] = 1_ _ _),
the encoder battery must be installed to the servo amplifier for backing up the absolute position data of
the load side. In this case, the battery life will be shorter because the power consumption is increased as
the power is supplied to the two encoders of motor side and load side.
POINT
Always use the scale measurement encoder cable introduced in this section.
Using other products may cause a malfunction.
For details of the scale measurement encoder specifications, performance and
assurance, contact each encoder manufacturer.
MR-J4-_B_
Servo motors used as encoders
MR-J4W2-_B
HG-KR HG-MR
: Available
HG-KR HG-MR
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