Absolute Position Detection System; Features - Mitsubishi Electric MR-J3-10B Instruction Manual

12. ABSOLUTE POSITION DETECTION SYSTEM

12. ABSOLUTE POSITION DETECTION SYSTEM
CAUTION

12.1 Features

For normal operation, as shown below, the encoder consists of a detector designed to detect a position within
one revolution and a cumulative revolution counter designed to detect the number of revolutions.
The absolute position detection system always detects the absolute position of the machine and keeps it
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battery-backed, independently of whether the servo system controller power is on or off.
Therefore, once home position return is made at the time of machine installation, home position return is not
needed when power is switched on thereafter.
If a power failure or a fault occurs, restoration is easy.
Servo system controller
Servo motor
If an absolute position erase alarm (25) or absoluto position counter warning (E3)
has occurred, always perform home position setting again. Not doing so can cause
runaway.
Current
position
Home position data
LS0
CYC0
1 pulse/rev accumulative revolution counter
Super capacitor
Within one-revolution counter
Servo amplifier
Position data
Detecting
the number
of revolutions
MR-J3BAT
Battery
12 - 1
Detecting the
position within
one revolution
High speed serial
communication