Communication Overview; Communication Between The Master Station And Remote I/O Station - Mitsubishi A1SJ61BT11 User Manual

1 OVERVIEW

1.3 Communication Overview

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

PC CPU
SET Yn0
SET Yn6
FROM
TO
The overview of the communication between the master station and remote I/O station
is described below.
Refer to Section 4.2 for details.
1
2
4
5
Turn on the refresh specification
1
Startup the data link.
2
By the link scan, the remote I/O station's input information is stored in the master
3
station's remote input (RX).
By the FROM instruction, read from the remote input (RX).
4
By the TO instruction, write the on/off data to the remote output (RY).
5
By the link scan, the remote I/O station's output is turned on/off.
6
Master station
Refresh specification
Data link startup
Buffer memory
Remote input
(RX)
Remote output
(RY)
1 - 9
MELSEC-A
Remote I/O station
3
Link scan
Input
6
Link scan
Output