Mitsubishi Electric MELSEC-A Series Manual page 82

2
REPLACEMENT OF MELSECNET (II) AND /B (PLC TO PLC NETWORK)
Data flow between each station of MELSECNET/H is shown at next page.
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 (common parameter)
Cyclic
communication
Transit by station inherent parameter
Inter-link data transfer
Inter-link data transfer from module 1 to 2
Inter-link data transfer from module 2 to 1
Link fresh
2
- 45
B/W 0 100 180
1Mp3 2Mp3 2Ns1 2Ns2
Station inherent parameter
LB/LW
0 100 180
1Mp3 2Mp3 2Ns1
Common
parameters
LB/LW
1Mp3
Common
parameters
LB/LW
0
1Mp3
Common
parameters
LB/LW
0 100 180
1Mp3 2Mp3
2Mp3
Common
parameters
LB/LW 0
2Mp3
Station inherent
parameter
LB/LW 0
100 180
2Mp3 2Ns1 2Ns2
1Mp3
0 100 180
B/W
2Mp3 2Ns1 2Ns2
1Mp3
Transfers LB/LW which has been set on common parameter to all stations
of MELSECNET/H by cyclic communication.
LB/LW which has been set on common parameter is changed to LB/LW,
inherent to MELSECNET/H station, and transferred.
Transfers LB/LW of MELSECNET/H to the device of CPU.
Flow of LB/LW link data
200 280 380 400 500 580
Empty
1Ns2 1Mp3 2Mp3 2Ns1 2Ns2
Link refresh
200 280 380 400 500 580
Empty
2Ns2 1Ns2 1Mp3 2Mp3 2Ns1 2Ns2
200 380 500
1Ns2
1Ns1
Cyclic
communication
200 500
1Ns1
1Ns2
2Mp3 2Ns1 2Ns2 2Mp3 2Ns1
2Ns2
280 300 400 4FF
1Mp3 2Mp3
2Ns1 2Ns2
Cyclic
communication
300 400 4FF
2Ns1 2Ns2
200 280 400 500 580 600
2Mp3 2Ns1 2Ns2
Empty 1Mp3
Link refresh
280 400 500 580 600
200
Empty 2Mp3 2Ns1 2Ns2
1Mp3
Transfers LB/LW between modules with different
network numbers mounted to one CPU.
600 680 77F 1FFF
1Ns2
600 680
1Ns2
Transferred by station
inherent parameter
6FF
Network1,2
Gateway station
1Ns1/2Mp3
6FF
Link
refresh
Inter-link data transfer
Link
refresh
Transferred
by refresh
parameter
Transferred by station
inherent parameter
67F
1FFF
67F
CPU