Using The Mr-Bt6Vcase Battery Case - Mitsubishi MR-JE-10B Instruction Manual

12. ABSOLUTE POSITION DETECTION SYSTEM

12.2.2 Using the MR-BT6VCASE battery case

(1) Configuration diagram
Servo system controller
Home position data
(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 five MR-BAT6V1 batteries. The battery life varies depending on the number of target 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 can hold the absolute position data of up to 8-axis servo
motors.
Always install five MR-BAT6V1 batteries to MR-BT6VCASE.
Current position
LS0
CYC0
Servo motor
Accumulative revolution counter
Within one revolution counter
Item
Servo amplifier
Position data
Step-down
circuit
( 6 V 3.4 V )
MR-BT6VCASE
MR-BAT6V1 × 5
(1 pulse/rev)
Electronic battery backup type
Home position ± 32767 rev.
(only when acceleration time until 6000 r/min is 0.2 s or longer)
Approximately 40,000 hours/2 axes or less, 30,000 hours/3 axes, or
(equipment power supply: off, ambient temperature: 20 °C)
Approximately 55,000 hours/2 axes or less, 38,000 hours/3 axes, or
(power-on time ratio: 25%, ambient temperature: 20 °C) (Note 3)
12 - 4
LS CYC
Detecting the Detecting the
number of position within
revolutions one revolution
High speed
serial
communication
Description
6000
10,000 hours/8 axes
15,000 hours/8 axes