Communication Between Master Station And Intelligent Device Stations - Mitsubishi FX3U User Manual

FX -16CCL-M User's Manual
3U
6.2.3

Communication between master station and intelligent device stations

This subsection describes the overview of the communication between the master station and intelligent
device stations.
PLC
SET
BFM#10 b0
SET
BFM#10 b6
Data link startup
1) The PLC sets to ON the write refresh command (BFM#10 b0), and makes the data of the remote output
(RY) effective.
When the write refresh command (BFM#10 b0) is OFF, all data of the remote output (RY) is treated as "0
(OFF)".
2) The PLC sets to ON the write data link startup by buffer memory parameters (BFM#10 b6) to start the
data link.
When the data link starts normally, the read data link status in master station (BFM#10 b1) turns ON.
48
Master station
1)
M Refresh command
2)
M Data link startup
Buffer memory
4)
FROM Remote input (RX)
5)
TO Remote output (RY)
7)
Remote register
TO
10)
Remote register
FROM
Intelligent device station
3)
Link scan
6)
Link scan
8)
Link scan
(RWw)
9)
Link scan
(RWr)
6 Introduction of Functions
6.2 Basic Functions
Remote input
(RX)
Remote output
(RY)
Remote register
(RWw)
Remote register
(RWr)