CHAPTER 11 ABSOLUTE POSITION SYSTEM
11-2 Specifications
11
11.1 Specifications
11.1.1 Specification List
Item Description
Method Battery backup method
Battery Lithium battery (primary battery, nominal +3.6 V)
Max. rotation range Home position ±32767 rev
Max. rotation speed at power
failure
6000 r/min
Service life of battery About 35000 hours (life without power turned on)
It is recommended to replace the battery periodically (every three years or more
frequently) despite the power-on or shutdown state.
11.1.2 Precautions
Marine or air transport of battery (lithium-metal battery)
The following precautions must be taken when you transport lithium-metal batteries in any of the
conditions of the followings: individually, packaged with the devices, or mounted in devices.
1) When transporting lithium-metal batteries mounted in devices
When transporting the batteries together with a control panel or the like instrumented with five or
more servo amplifiers into which the batteries are mounted, attach the label Fig. 1 below and
submit the transportation documents.
2) When transporting lithium-metal batteries packaged with devices
It is necessary to attach the label Fig. 1 below and submit the transportation documents to issue
the drop test certificate.
Furthermore, the allowable number of the batteries to be transported by air is the number
required to operate the device plus two.
Fig.1 Label to be attached to the package outer surface
Size: 120 ×110 mm
For details contact us or Fuji Electric Systems representative.
Conditions blocking establishment of absolute position system
The absolute position system is not established under the following conditions.
The electronic gear setting is changed after position preset.
The command pulse ratio is changed after position preset.
The absolute position system can be established even under speed control or torque control.
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