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General description
6
Absolute position detection system
6.1
General description
b
CAUTION:
If an absolute position erase alarm (25) has occurred, always perform home position
setting again. Not doing so can cause runaway.
6.1.1
Specifications
Item
System
Battery
Maximum revolution range
Maximum speed at power failure
Battery backup time
Data holding time during battery replacement
Battery storage period
Tab. 6-1: Specification overview
Time to hold data by a battery with power off.
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.
MELSERVO J2-Super
Absolute position detection system
Description
Electronic battery backup system
Lithium battery A6BAT or MR-BAT
Reference position ±32767 rev.
500r/min
Approx. 10000h
2h at delivery, 1h in 5 years after delivery
Approx. 5 years
6 - 1
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