12. ABSOLUTE POSITION DETECTION SYSTEM
12 - 2
12.2 Specifications
WARNING
Before wiring or inspection, turn off the power and wait for 15 minutes or more until
the charge lamp turns off. Otherwise, an electric shock may occur. In addition,
always confirm from the front of the servo amplifier, whether the charge lamp is off
or not.
CAUTION
Do not have new and old batteries installed together.
When replacing batteries, replace all batteries by new batteries.
POINT
The internal circuits of the servo amplifier may be damaged by static electricity.
Always take the following precautions.
Ground human body and work bench.
Do not touch the conductive areas, such as connector pins and electrical parts,
directly by hand.
Before starting battery changing procedure, make sure that the main circuit power
is switched OFF with the control circuit power ON. When battery is changed with
the control circuit power OFF, the absolute position data is lost.
(1) Specification list
Item Description
System
Electronic battery backup system
Battery unit
MR-BAT: Lithium battery (primary battery, nominal 3.6V) 8
MR-BTCASE: Battery case
Maximum revolution range
Home position 32767 rev.
(Note 1) Maximum speed at power failure
3000r/min
(Note 2) Battery backup time
Approx. 10,000 hours (battery life with power off)
(Note 3) Battery life
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. Replace battery within 3 years since the operation start whether power is kept
on/off. If the battery is used out of specification, the absolute position lost (25) may occur.
3. Quality of battery degrades by the storage condition. It is recommended to connect and use battery in the servo amplifier
within 2 years from the production date. The life of battery is 5 years from the production date regardless of the connection.
Summary of Contents for MELSERVO-J3W Series
Page 17: ...8 MEMO ...
Page 27: ...1 FUNCTIONS AND CONFIGURATION 1 10 MEMO ...
Page 87: ...4 STARTUP 4 14 MEMO ...
Page 117: ...5 PARAMETERS 5 30 MEMO ...
Page 129: ...6 GENERAL GAIN ADJUSTMENT 6 12 MEMO ...
Page 185: ...10 CHARACTERISTICS 10 8 MEMO ...
Page 241: ...11 OPTIONS AND AUXILIARY EQUIPMENT 11 56 MEMO ...
Page 274: ...13 USING A LINEAR SERVO MOTOR 13 25 1 2 3 4 ...