Communication With Local Stations - Mitsubishi LJ61BT11 User Manual

8.1.3 Communication with local stations

Programmable
controller CPU
1)
Network
parameters
Automatic
refresh
parameters
4)
X
Automatic refresh
4)
Automatic refresh
X
6)
Automatic refresh
Y
6)
Y Automatic refresh
9)
Automatic refresh
W
9)
Automatic refresh
W
14)
Automatic refresh
W
14)
Automatic refresh
W
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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).
Master station
Network
parameters
Buffer memory
Remote input RX
3)
Receive area
from local Link scan
station No. 1
3)
Receive area
from local
Link scan
station No. 2
to
Remote output RY
7)
Send area to
local station
Link scan
No. 1
7)
Send area to
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 No. 1
13)
Receive area
from local
Link scan
station No. 2
to
POINT
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.
Local station
(station number 1)
Buffer memory
Remote output RY
3)
Host station
(station number 1)
Link scan
send area
3)
Receive area
from local
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
RWr
10)
Receive area
from master Link scan
station
10)
Receive area
from master
Link scan
station
to
Remote register
RWw
13)
Host station
(station number 1) Link scan
send area
13)
Receive area
from local
Link scan
station No. 2
to
Local station
(station number 2)
1)
Network
parameters
Buffer memory
Remote output RY
5)
Receive area
from local Automatic refresh
station No. 1
2)
Host station
(station number 2) Automatic refresh
send area
to
Remote input RX
8)
Receive area
from master
Automatic refresh
station
8)
Receive area
from master
Automatic refresh
station
to
Remote register
RWr
11)
Receive area
from master Automatic refresh
station
11)
Receive area
Automatic refresh
from master
station
to
Remote register
RWw
15)
Receive area
from local
Automatic refresh
station No. 1
12)
Host station
Automatic refresh
(station number 2)
send area
to
8 FUNCTIONS
Programmable
controller CPU
Network
parameters
Automatic
refresh
parameters
Y
Y
X
X
W
W
W
W
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