Using Mr-Bat6V1Bj Battery For Junction Battery Cable - Mitsubishi Electric MR-J4-10A(-RJ) Instruction Manual

12. ABSOLUTE POSITION DETECTION SYSTEM

12.2.2 Using MR-BAT6V1BJ battery for junction battery cable

(1) Configuration diagram
General purpose
programmable controller
CPU Positioning module
Current
position
I/O module
(2) Specifications
(a) Specification list
System
Maximum revolution range
(Note 1)
Maximum speed at power
failure [r/min]
(Note 2)
Battery backup time
Note 1. Maximum speed available when the shaft is rotated by external force at the time of power failure or the like. Also, if power is
switched on at the servo motor speed of 3000 r/min or higher, position mismatch may occur due to external force or the like.
2. The data-holding time by the battery using MR-BAT6V1BJ. Replace the batteries within three years since the operation start
regardless of the power supply of the servo amplifier on/off. If the battery is used out of specification, [AL. 25 Absolute position
erased] may occur.
3. The power-on time ratio 25% is equivalent to 8 hours power on for a weekday and off for a weekend.
POINT
MR-BAT6V1BJ is compatible only with HG series servo motors. It cannot be
used with direct drive motors.
MR-BAT6V1BJ cannot be used for fully closed loop system.
Pulse train
command
Input
Output
Primary lithium battery
Step-down circuit
Servo motor
Cumulative revolution counter
(1 pulse/rev)
Counter within one revolution
Item
Rotary servo motor
Rotary servo motor
Home position data
EEP-ROM memory
LSO
1XO
Backed up in the
case of power
failure
Step-down
circuit
(6 V → 3.4 V)
MR-BAT6V1BJ
Battery
Electronic battery backup type
Home position ± 32767 rev.
(only when acceleration time until 6000 r/min is 0.2 s or more)
Approximately 20,000 hours
(equipment power supply: off, ambient temperature: 20 °C)
Approximately 29,000 hours
(power-on time ratio: 25%, ambient temperature: 20 °C) (Note 3)
12 - 5
Servo amplifier
Current
position
LS 1X
Detecting the Detecting the
number of position within
revolutions one revolution
High-speed
serial
communication
Description
6000