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8   PROGRAMMING 

MELSEC-QnA 

 

8.3 Programming Procedure 

The procedure for creating a program is described. 
 

 

8.3.1 Communication between the master station and remote I/O station 

The basic procedure for creating a program to communicate with remote I/O station is 
shown below. 
Refer to Chapter 9 for a program example. 

 

.........Yn0

.........Yn6

.........YnA

.........Yn0

.........Yn8

For debugging only 

 

For operation only 

 

Parameter setting

Refresh instruction

Refresh instruction

2

Parameter registration to E PROM 

 

Data link startup by the E

2

PROM  

parameters

Read from remote input (RX) 

 

ON/OFF control of remote output (RY) 

 

Write to remote output (RY)

.........Buffer memory address E0

H

 to 15F

H

.........Buffer memory address 160

H

 to 1DF

H

.........Buffer memory address 0

H

 to 5F

H

Control by the read remote-input  
information

Data link startup by the buffer-memory  
parameters