Increasing The Number Of Send Points By Installing Multiple Modules With The Same Network (High Performance Model Qcpu, Process Cpu, Redundant Cpu, And Universal Model Qcpu) - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

7 APPLICATION FUNCTIONS
7.9 Increasing the Number of Send Points by Installing Multiple Modules with the Same
Network (High Performance model QCPU, Process CPU, Redundant CPU, and
Universal model QCPU)
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The number of send points (maximum of 2,000 bytes per station) can be increased up
to a maximum of 8,000 bytes (when four cards are installed) by installing multiple
network modules with the same network number to one CPU module.
[Example]
In the system configuration shown below, a maximum of 4,000 bytes can be send by
installing station 1Mp1 and station 1Ns2 on one CPU module.
CPU
1M
Maximum of
2,000 bytes
1N
Maximum of
2,000 bytes
1N
1N
1M 1
1N 2
P
S
QJ71 QJ71
CPU
LP21
LP21
QJ71
CPU
LP21
1N 4
S
POINT
The Basic model QCPU, Q00UJCPU, Q00UCPU, Q01UCPU, and safety CPU
accept only one network module.
Hence, the number of send points cannot be increased by installing multiple
modules on the same network.
1M 1
P
B LB
1
1M 1
P
P
2
1N 2
S
S
3
1N 3
S
S
4
1N 4
S
S
Network No. 1
CPU
1N 2
S
LB
1M 1
P
1N 2
S
1N 3
S
1N 4
S
QJ71
LP21
1N 3
S
MELSEC-Q
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