Using Mr-Bt6Vcase Battery Case - Mitsubishi Electric MR-J4-10A(-RJ) Instruction Manual

12. ABSOLUTE POSITION DETECTION SYSTEM

12.2.3 Using MR-BT6VCASE battery case

(1) Configuration diagram
General purpose
programmable controller
CPU Positioning module
Current
position
I/O module
(2) 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 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 25% is equivalent to 8 hours power on for a weekday and off for a weekend.
POINT
One MR-BT6VCASE holds absolute position data up to eight axes servo motors.
Always install five MR-BAT6V1 batteries to an MR-BT6VCASE.
Pulse train
command
Input
Output
MR-BT6VCASE
MR-BAT6V1 × 5
Servo motor
Cumulative revolution counter
(1 pulse/rev)
Counter within one revolution
Item
Rotary servo motor
Direct drive motor
Rotary servo motor
Direct drive 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 )
Electronic battery backup type
Home position ± 32767 rev.
(only when acceleration time until 6000 r/min is 0.2 s or more)
(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 °C)
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 °C) (Note 4)
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 °C)
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 °C) (Note 3)
12 - 6
Servo amplifier
Current
position
LS 1X
Detecting the Detecting the
number of position within
revolutions one revolution
High-speed
serial
communication
Description
6000
500