Download Transition from MELSEC-A/QnA (Large Type), AnS

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REPLACEMENT OF MELSECNET (II) AND MELSECNET/B (PLC TO PLC
For MELSECNET/H normal station 1Ns1 that is gateway station, change the settings of
MELSECNET II 2-tier first half/second half settings by:
• Dividing the data into the first half and second half and refreshing them by the setting of "Refresh
parameters"*1
Also, for MELSECNET/H control station 2Mp3 of gateway station, change the settings of
MELSECNET II 3-tier first half/second half settings by:
• Assigning LB/LW (first + last size) to each station by the setting of "Network range assignment
(Common parameters)"*2
• Dividing the data into the first half and second half and refreshing them by the setting of "Refresh
parameters"*1
MELSECNET/H network 1
Normal station 1Ns1
CPU
MELSECNET/H network 2
Control station 2Mp3
Common parameters
B/W
LB/LW
0
100
0
100
1Mp3
180
200
200
280
LB/LW
1Mp3
1Mp3
2Mp3
2Mp3
2Ns1
2Ns2
1Ns2
1Ns1
380
400
Empty
1Mp3
500
500
580
600
600
1Ns2
680
6FF
0
100
2Mp3 180
1Mp3
2Mp3
280
300
2Ns1
380
2Ns2
480
400
4FF
2Mp3
2Ns1
2Ns2
1Ns2
77F
1FFF
1FFF
1FFF
Link refresh
*1
Set not to duplicate B/W on the CPU.
*2
Perform the LB/LW assignment for network 2 control station 2Mp3 including the same LB/LW area as that of 1Mp3 to relay
network 1 control station 1Mp3.
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