Absolute Position Detection System Under Fully Closed Loop System - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Absolute position detection system under fully closed loop
system
An absolute type linear encoder is necessary to configure an absolute position detection system under fully closed loop
control using a linear encoder. In this case, the encoder battery need not be installed to the servo amplifier. 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.
For the absolute position detection system with linear encoder, the restrictions mentioned in this section apply. Enable the
absolute position detection system with [Pr. PA03 Absolute position detection system] and use this servo within the following
restrictions.
Using conditions
• Use an absolute type linear encoder with the load-side encoder.
• Select Always fully closed loop ([Pr. PA01] = _ _ 1 _ and [Pr. PE01] = _ _ _ 0).
Absolute position detection range using encoder
Encoder type
Linear encoder (Serial interface)
Alarm detection
The absolute position-related alarm ([AL. 25]) and warnings (AL. 92] and [AL. 9F]) are not detected.
16 FULLY CLOSED LOOP SYSTEM
532
16.3 Operation and functions
Absolute position detection enabled range
Movable distance range of linear encoder (within 32-bit absolute position data)