Mitsubishi Electric MELSEC-A Series Manual page 65

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
The following shows the flow of MELSECNET/H link data after being replaced from MELSECNET (II).
Network1
CPU
MELSECNET/H
Network 1
Control station 1Mp3/
Normal station 1Ns2
MELSECNET/H
Network 1
Normal station
1Ns1
Gateway station
MELSECNET/H
Network 2
Control station 2Mp3
MELSECNET/H
Network 2
Normal station 2Ns1/
Normal station 2Ns2
Network2
CPU
[Designation of arrow in the figure]
Cyclic communication
Cyclic
communication
Inter-link data transfer
Inter-link data transfer from module 1 to 2
Inter-link data transfer from module 2 to 1
Link refresh
Flow of LB/LW link data
B/W 0 100 180 200
2Mp3 2Ns1 2Ns2
1Mp3
1Ns1
Link refresh
LB/LW 0 100
1Mp3 1Ns1
Common parameters
Cyclic
communication
LB/LW 0 100
1Mp3
1Ns1
Inter link transfer
LB/LW 0 100 180 200
2Ns1 2Ns2
2Mp3
Common parameters
Cyclic
communication
LB/LW 0 180
2Ns1 2Ns2
2Mp3
Link refresh
B/W 0 100 180 200
2Mp3
2Ns1 2Ns2
1Mp3 2Mp3
Transfers LB/LW which has been set on common parameter to all
stations of MELSECNET/H by cyclic communication.
Transfers LB/LW of MELSECNET/H to the device of CPU.
280 37F 3FF
1Ns2
280 37F
1Ns2
280 37F
1Ns2
Link refresh
Link refresh
Link refresh
27F
200 27F
27F 3FF
Transfers LB/LW between modules with
different network numbers mounted to
one CPU.
Network1, 2
Gateway station
1Ns1/2Mp3
CPU
B/W
0
1Mp3
100
2Mp3
180
2Ns1
200
2Ns2
280
1Ns2
37F
3FF
2
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