Mitsubishi Electric Q80BD-J61BT11N, User Manual

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MELSEC
4 FUNCTIONS
4.2.3 Communication with the local stations
The following explains an overview of the communication between the master station
and the local stations.
(1) Communication between the master station and the local stations
by cyclic transmission
The data communication between programmable controller CPUs and personal
computers can be performed in n:n mode using the remote input RX and remote
output RY (bit information used in local station systems) as well as the remote
register RWw and remote register RWr (word information for writing and reading
used in local station systems).
Send area to
local station No. 1
Receive area from
local station No. 1
Network
parameters
Receive area from
local station No. 2
Send area to
local station No. 2
Remote input RX
Remote register
RWw
Buffer memory
Remote register
RWr
Receive area from
master station
Own station
(station number 1)
send area
Receive area from
local station No. 2
Remote output RY
Remote input RX
Remote register
RWr
Buffer memory
Receive area from
master station
Link scan Read
Read
mdReceive
mdReceive
mdSend
mdSend
mdSend
mdSend
mdReceive
mdReceive
1)
4)
6)
6)
9)
9)
14)
14)
3)
7)
7)
10)
10)
13)
13)
Personal computer Master station Local station (station number 1)
Receive area from
master station
Receive area from
local station No. 1
Network
parameters
Automatic refresh
parameters
Own station
(station number 2)
send area
Remote output RY
Remote input RX
Buffer memory
X
X
Y
Y
D
D
D
D
1)
PLC CPU Local station (station number 2)
Receive area from
master station
4)
Write
Write
Write
Write
Link scan
3)
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
Link scan
3)
Link scan
3)
7)
7)
Link scan
Link scan
10)
10)
Link scan
Link scan
13)
Link scan
Link scan
Automatic refresh
Automatic refresh
5)
2)
Automatic refresh
Automatic refresh
8)
8)
Automatic refresh
Automatic refresh
11)
11)
Automatic refresh
Automatic refresh
15)
12)
Remote output RY
13)
CC-Link Ver.2 board
Program
Network
parameters
Automatic refresh
parameters
to to to
to to to
Send area to
local station No. 1
Send area to
local station No. 2
Receive area from
local station No. 1
Receive area from
local station No. 2
Read
Read
Own station
(station number 1)
send area
Receive area from
local station No. 2
Remote register
RWw
Receive area from
master station
Receive area from
master station
Receive area from
local station No. 1
Own station
(station number 2)
send area
Receive area from
master station
Receive area from
master station
Remote register
RWr
Remote register
RWw
to to to
to to to
POINT
The master station only sends data to stations where datalink has been started.
The master station does not send any data to stations where datalink has not been
started.