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7   DATA LINK PROCEDURE 

MELSEC-QnA 

 

(2)   Do not skip station numbers. 

The skipped station number is treated as a "data-link faulty station (link special 
register SW0080 to 0083: can be checked with buffer memory address 680

H

 to 

683

H

)". 

However, by setting as a reserved station, the station number will not be treated 
as a data-link faulty station. 
[Setting example] When a station number is skipped: 

 

    Remote station

1

    Remote station

2

    Local station

3

    Local station

4

Station No.1 Station No.2 Station No.3 Station No.4 Station No.5 Station No.6 Station No.7 Station No.8 Station No.9

Data link faulty station (When set as a  reserved, 
the station number will not be treated as a faulty station.)

1

      Remote station 
(occupies 1 station)

    

2

     Remote station 
(occupies 2 stations)

Master station

Station 

number "0"

Station 

number "1"

Station 

number "2"

Station 

number "5"

Station 

number "9"

3

Local station

(occupies 4

stations)

4

Local station

(occupies 1 

station)