Mitsubishi Electric MR-J4 TM Series, Инструкция по эксплуатации, Страница: 436 / 594

12. ABSOLUTE POSITION DETECTION SYSTEM
12 - 3
12.2 Battery
12.2.1 Using MR-BAT6V1SET-A battery
(1) Configuration diagram
EEP-ROM memory
Servo amplifier
Current
position
LS
Detecting the
number of
revolutions
1X
Det
ecting the
position within
one revolution
MR-BAT6V1SET-A
One-revolution counter
Posi
tion contr
o
l
Speed contr
o
l
Cumulative revolution counter
(1 pulse/rev)
Servo motor
Command
position
High speed
serial
communication
LSO
1XO
Backup at
power off
Home position data
Controller
Step-down
circuit
(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-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.