Mitsubishi Electric MR-J4, Instruction Manual

Page: 491 / 794

12. ABSOLUTE POSITION DETECTION SYSTEM
12 - 4
12.2 Battery
12.2.1 Using MR-BAT6V1SET battery or MR-BAT6V1SET-A battery
(1) Configuration diagram
EEP-ROM memory
Servo amplifier
Current
position
Current
position
Positioning module
Output
Input
I/O module
LS
Detecting the
number of
revolutions
1X
Detecting the
position within
one revolution
Posi
tion contr
o
l
Speed contr
o
l
MR-BAT6V1SET
Counter within one revolution
1 pulse/rev accumulative revolution
counter (1 pulse/rev)
Servo motor
Pulse train
command
High-speed
serial
communication
CPU
LSO
1XO
Backed up in the
case of power
failure
Home position data
Changing the
current
position data
General purpose
programmable controller
Step-down
circuit
Battery
(6 V
→
3.4 V)
(2) Specifications
(a) Specification list
Item Description
System Electronic battery backup type
Maximum revolution range Home position ± 32767 rev.
(Note 1)
Maximum speed at power
failure [r/min]
Rotary servo motor
6000
(only when acceleration time until 6000 r/min is 0.2 s or more)
Direct drive motor
500
(only when acceleration time until 500 r/min is 0.1 s or more)
(Note 2)
Battery backup time
Rotary servo motor
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)
Direct drive motor
Approximately 5,000 hours
(equipment power supply: off, ambient temperature: 20 °C)
Approximately 15,000 hours
(power-on time ratio: 25%, ambient temperature: 20 °C) (Note 3)
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-BAT6V1SET or MR-BAT6V1SET-A. 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.