Specifications

5– 4
5.ABSOLUTE POSITION DETECTION SYSTEM
The internal circuits of the servo amplifier may be damaged by static electricity.
Always take the following precautions:
1. Ground human body and work bench.
2. Do not touch the conductive areas, such as connector pins and electrical
parts, directly by hand.
1) Open the operation window. (When the model used is the MR-J2-200A or more, also remove the front cover.)
2) Install the battery in the battery holder.
3) Insert the battery connector into CON1 until it clicks.
2) Communication sequence
Programmable controller Servo amplifier
Step 1
Step 2
Step 3
Step 4
These steps are repeated
19 times to make up data.
DI/DO is used to transfer ABS
data between servo amplifier and
programmable controller.
2-bit data is sent 19 times
(32 bits of data + 6 bits of
checksum = total of 38 bits).
Requests ABS transfer
mode.
Receives ready to send.
Outputs ABS data
request signal.
Receives 2 bits of ABS data.
(ABS processing complete)
Changes DI/DO function for
ABS transfer I/O signal.
Reads ABS data from encoder,
creates current position data,
and outputs ready to send.
Receives ABS data
request signal.
Outputs 2 bits of ABS data.
(5) Battery installation procedure
NOTICE
Battery connector
Battery
Operation window
CON1
Battery holder
For MR-J2-200A or more
(6) Parameter setting
Set 1 in parameter No. 1 to make the
absolute position detection system valid.
Battery connector
CON1
Battery
Battery holder
For MR-J2-200A or more
1
Parameter No. 1
Positioning system
0: Incremental
1: Absolute position detection system