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13 -  2

13. ABSOLUTE POSITION DETECTION SYSTEM

13.2 Specifications

(1) Specification list

POINT

The revision (Edition 44) of the Dangerous Goods Rule of the

International Air Transport Association (IATA) went into effect on

January 1, 2003 and was enforced immediately. In this rule, "provisions of

the lithium and lithium ion batteries" were revised to tighten the

restrictions on the air transportation of batteries. However, since this

battery is dangerous goods (Class 9), requires packing compliant with the

Packing Standard 903. When a self-certificate is necessary for battery

safety tests, contact our branch or representative. For more information,

consult our branch or representative. (As of October, 2005).

Item

Description

Model

MR-J2M-BT

System

Electronic battery backup system

Battery unit

Lithium battery ( primary battery, nominal   3.6V)

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 unit

voltage low or the battery unit removed, or during which data can be held with the encoder cable disconnected.

Battery replacement should be finished within this period.

(2) Configuration

CN1A

CN2

CON5

Servo system controller

Interface unit

MR-J2MBTCBL 

Base unit

Drive unit

Battery unit
MR-J2M-BT 

Servo motor

 (3) Parameter setting

Set "0001" in DRU parameter No.1 to make the absolute position detection system valid.

Absolute position detection selection
 0: Valid (used in incremental system.)
 1: Invalid (used in absolute position
     detection system.)