Using Mr-Bt6Vcase Battery Case - Mitsubishi Electric MELSERVO-J4 Series Instruction Manual

Using MR-BT6VCASE battery case

• One MR-BT6VCASE can hold the absolute position data of up to 8-axis servo motors.
• Always install five MR-BAT6V1 batteries to an MR-BT6VCASE.
Configuration diagram
Controller
Servo motor
Specification list
Item
System
Maximum revolution range
Maximum speed at power failure [r/
*1
min ]
*2
Battery backup time
*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 five MR-BAT6V1s. The battery life varies depending on the number of axes (including axis for
using in the incremental system). 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.
12 ABSOLUTE POSITION DETECTION SYSTEM
452
12.2 Battery
Command
Home position data
position
EEP-ROM memory
LSO
1XO
Backup at
power off
Step-down
circuit
(6 V 3.4 V)
MR-BT6VCASE
MR-BAT6V1 × 5
Cumulative revolution counter
(1 pulse/rev)
One-revolution counter
Rotary servo motor
Direct drive motor
Rotary servo motor
Direct drive motor
Servo amplifier
Current
position
LS 1X
Detecting the Detecting the
number of position within
revolutions one revolution
Description
Electronic battery backup type
Home position  32767 rev.
6000
(only when acceleration time until 6000 r/min is 0.2 s or more)
500
(only when acceleration time until 500 r/min is 0.1 s or more)
Approximately 40,000 hours/2 axes or less, 30,000 hours/3 axes, or 10,000
hours/8 axes
(equipment power supply: off, ambient temperature: 20 )
Approximately 55,000 hours/2 axes or less, 38,000 hours/3 axes, or 15,000
hours/8 axes
(power-on time ratio: 25%, ambient temperature: 20 )
Approximately 10,000 hours/2 axes or less, 7,000 hours/3 axes, or 5,000
hours/4 axes
(equipment power supply: off, ambient temperature: 20 )
Approximately 15,000 hours/2 axes or less, 13,000 hours/3 axes, or 10,000
hours/4 axes
(power-on time ratio: 25%, ambient temperature: 20 )
High speed
serial
communication
*3
*3