Multiple Network System (High Performance Model Qcpu, Process Cpu, Redundant Cpu, And Universal Model Qcpu) - Mitsubishi Electric Melsec QJ71LP21 Reference Manual

2 SYSTEM CONFIGURATION
2.1.4 Multiple network system (High Performance model QCPU, Process CPU, Redundant
CPU, and Universal model QCPU)
Control station
1M 1
P
Q25H QJ71
CPU LP21
Network No. 1
Q25H QJ71 QJ71
CPU LP21 BR11
1N 3
S
Normal
station
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(1) What is multiple network system
The multiple network system is a network system in which multiple networks are
connected via relay stations.
(a) Duplicated setting of a network number is not allowed. The network
number can be freely set within a range from 1 to 239 unless the same
number is used two or more times in a system.
(b) A maximum of 4 network modules can be installed per programmable
controller.
Note that there are restrictions on the number of modules that can be
installed to each programmable controller, depending on the CPU module
model. (Refer to the user's manual for the CPU module used.).
Network No. 1
Network No. 2
POINT
Only one network module can be mounted to the Basic model QCPU, Q00UJCPU,
Q00UCPU, Q01UCPU, and safety CPU.
For this reason, these CPUs cannot be used as relay stations when configuring a
multiple network system using the MELSECNET/H.
(2) Configuration
The following example shows how three networks can be connected.
Normal station
1N 2
S
Q25H QJ71
CPU LP21
Control station
3M 1
P
Q25H QJ71
CPU BR11
3N 2
S
Normal station
Network No. 4
Network No. 3
Control station
2M 1
P
QJ71
LP21
Network No. 2
Network No. 3
Q25H QJ71
CPU BR11
3N 3
S
Normal station
MELSEC-Q
Normal station
2N 2
S
Q25H QJ71
CPU LP21
Q25H QJ71
CPU LP21
Q25H QJ71
CPU BR11
3N 4
S
Normal station
Normal station
2N 3
S
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