Communication With Local Stations - Mitsubishi Electric L26CPU-BT User Manual

8.1.3

Communication with local stations

This section explains an overview of the communication between the master and local stations.
(1) Communication between the master and local stations by cyclic transmission
Data communication between programmable controller CPUs can be performed in N:N mode using remote input
RX and remote output RY (bit data used in local station systems) as well as remote register RWw and remote
register RWr (word data for writing and reading used in local station systems).
Programmable
controller CPU
Network
1)
parameters
Automatic
refresh
parameters
4)
Automatic refresh
X
4)
Automatic refresh
X
6)
Automatic refresh
Y
6)
Automatic refresh
Y
9)
Automatic refresh
W
9)
Automatic refresh
W
14)
Automatic refresh
W
14)
Automatic refresh
W
The master station sends only the data for the stations that are performing data link.
The data for the stations that are not performing data link are not sent.
118
Master station
(station number 1)
Network
parameters
Buffer memory
Remote input RX Remote output RY
3)
Receive area
from local Link scan (station number 1)
station No. 1
3)
Receive area
from local
Link scan
station No. 2
to
Remote output RY Remote input RX
7)
Send area to
local station
Link scan
No. 1
Send area to 7)
local station
Link scan
No. 2
to
Remote register
RWw
10)
Send area to
local station Link scan
No. 1
10)
Send area to
local station
Link scan
No. 2
to
Remote register
RWr
13)
Receive area
from local Link scan (station number 1)
station No. 1
13)
Receive area
from local
Link scan
station No. 2
to
Local station
(station number 2)
Buffer memory Buffer memory
Remote output RY
3)
Host station
Link scan
send area
3)
Receive area
from local
(station number 2)
Link scan
station No. 2
to
Remote input RX
7)
Receive area
from master
Link scan
station
Receive area
7)
from master
Link scan
station
to
Remote register Remote register
RWr
10)
Receive area
Link scan
from master
station
10)
Receive area
from master
Link scan
station
to
Remote register Remote register
RWw
13)
Host station
Link scan
send area
13)
Receive area
from local (station number 2)
Link scan
station No. 2
to
Local station
1)
Network
parameters
5)
Receive area
Automatic refresh
from local
station No. 1
2)
Host station
Automatic refresh
send area
to
Receive area 8)
from master
Automatic refresh
station
Receive area
8)
from master
Automatic refresh
station
to
RWr
11)
Receive area
Automatic refresh
from master
station
11)
Receive area
from master
Automatic refresh
station
to
RWw
15)
Receive area
Automatic refresh
from local
station No. 1
12)
Host station
Automatic refresh
send area
to
Programmable
controller CPU
Network
parameters
Automatic
refresh
parameters
Y
Y
X
X
W
W
W
W