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5. STARTUP
(4) Outline of absolute position detection data communication
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
battery-backed, independently of whether the general-purpose programming controller power is on or off.
Therefore, once the home position is defined 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.
Point table No. selection,
etc.
(5) Battery installation procedure
WARNING
Servo amplifier
I/O circuit
Position data, speed data
(current position read)
MR-J3BAT
Servo motor
1 pulse/rev. Cumulative revolution counter
Within one-revolution counter
Before starting battery installation procedure, make sure that the charge lamp is off
more than 15 minutes after power is switched OFF. Then, confirm that the voltage
between P-N terminals is safe in the tester or the like with control circuit power ON.
Otherwise, you may get an electric shock.
POINT
The internal circuits of the servo amplifier may be damaged by static electricity.
Always take the following precautions:
Ground human body and work bench.
Do not touch the conductive areas, such as connector pins and electrical
parts, directly by hand.
Before starting battery changing procedure, make sure that the main circuit
power is switched OFF with the control circuit power ON. When battery is
changed with the control power OFF, the absolute position data is lost.
Home position return
data
EEP-ROM memory
LSO
1XO
Backup at
power off
Speed detection
5 - 56
Current position
1X
LS
Detection of position
within one revolution
High-speed serial
communication
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