Mitsubishi Electric MELSERVO-J4 series, Instruction Manual

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12 ABSOLUTE POSITION DETECTION SYSTEM
12.2 Battery
451
12
Using MR-BAT6V1BJ battery for junction battery cable
• 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.
Configuration diagram
Specifications
■
Specification list
*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 of 25% is equivalent to when the power is on for 8 hours a day on weekdays and off on weekends.
Item Description
System Electronic battery backup type
Maximum revolution range Home position

32767 rev.
Maximum speed at power failure [r/
min]
*1
Rotary servo motor 6000
(only when acceleration time until 6000 r/min is 0.2 s or more)
Battery backup time
*2
Rotary servo motor Approximately 20,000 hours (equipment power supply: off, ambient
temperature: 20
 )
Approximately 29,000 hours (power-on time ratio: 25%, ambient temperature:
20
 )
*3
EEP-ROM memory
Servo amplifier
Current
position
LS
Detecting the
number of
revolutions
1X
Detecting the
position within
one revolution
Position control
MR-BAT6V1BJ
Battery
Counter within one revolution
Cumulative revolution counter
(1 pulse/rev)
Servo motor
Command
position
High-speed
serial
communication
LSO
1XO
Home position data
Controller
Step-down
circuit
(6 V
ൺ
3.4 V)
Step-down circuit
Primary lithium battery
Speed control
Backup at
power off