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15. ABSOLUTE POSITION DETECTION SYSTEM
15.2 Specifications
(1) Specification list
Item Description
System Electronic battery backup system
Battery
1 piece of lithium battery ( primary battery, nominal
3.6V)
Type: MR-BAT or A6BAT
Maximum revolution range Home position 32767 rev.
(Note 1) Maximum speed at power failure 500r/min
(Note 2) Battery backup time Approx. 10,000 hours (battery life with power off)
(Note 3) Data holding time during battery
replacement
2 hours at delivery, 1 hour in 5 years after delivery
Battery storage period 5 years from date of manufacture
Note: 1. Maximum speed available when the shaft is rotated by external force at the time of power failure or the
like.
2. Time to hold data by a battery with power off. It is recommended to replace the battery in three years
independently of whether power is kept on or off.
3. Period during which data can be held by the super capacitor in the encoder after power-off, with the
battery voltage low or the battery removed, or during which data can be held with the encoder cable
disconnected.
Battery replacement should be finished within this period.
(2) Configuration
Positioning module I/O module
AD71 AD71S2 AD71S7
A1SD71S2 A1SD71S7
AD75
A1SD75
AX40 41 42
AY40 41 42
FX-1PG FX-1GM
FX(E)-20GM FX-10GM
FX2-32MT
CN1A
CN1B
CON1
Servo motor
CN2
AD75 etc.
I/O
Programmable controller Servo amplifier
Battery (MR-BAT)
(3) Parameter setting
Set " 1
" in parameter No.1 to make the absolute position detection system valid.
1
Selection of absolute position detection system
0: Incremental system
1: Absolute position detection system
Parameter No. 1