Mitsubishi Electric Melservo-Jet MR-JET G-N1 Series, User Manual

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7 ABSOLUTE POSITION DETECTION SYSTEM
7.2 Configuration and specifications
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7
7.2
Configuration and specifications
Connecting the battery backup type absolute position encoder
Refer to the following diagram when connecting the absolute position encoder.
System architecture
Specification list
*1 Maximum speed available when the shaft is rotated by external force at the time of power failure. Note that if the power is turned on
while the servo motor is being rotated by an external force at a speed of 3000 r/min or higher, a position mismatch may occur.
*2 The data-retention time with the MR-BAT6V1SET-B. 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 outside of specification range, [AL. 025 Absolute position erased] may
occur.
*3 Power-on ratio of 25 % is the equivalent to power-on for 8 hours on weekdays and power-off on weekends.
Item Description
System Electronic, battery backup type
Maximum revolution range Home position ± 32767 rev
Maximum speed at power failure
[r/min]
*1
6000
(only when the acceleration/deceleration time until 6000 r/min is 0.2 or longer)
Battery backup time
*2
Approximately 20000 hours (when the equipment power is off, and the ambient temperature is 20 ˚ C)
Approximately 29000 hours (when the power-on ratio is 25 %, and the ambient temperature is 20 ˚ C)
*3
LSO
1XO
MR-BAT6V1SET-B
MR-BAT6V1
Controller Servo amplifier
Home position data
Command
position
Current position
Backup at
power off
Control
1X
Detecting the
position within
one revolution
LS
Detecting the
number of
revolutions
Servo motor
Cumulative revolution counter
(1 pulse/rev)
High speed
serial
communication
One-revolution counter
Step-down circuit
6 V → 3.4 V
Non-volatile memory