Mitsubishi Electric Melsec QJ71LP21 Reference Manual page 368

7 APPLICATION FUNCTIONS
Control system
(system A)
Redundant Control
CPU station
Q25H
Normal
CPU station
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3) When connecting a redundant system as normal stations to a
MELSECNET/10 including an AnUCPU or QnACPU station acting as
a control station
The network module installed with an AnUCPU or QnACPU cannot be
set as a control station if a redundant system using Q4ARCPUs or
redundant CPUs exists in the network.
Change the network module status of the AnCPU or QnACPU to a
normal station, and connect the redundant system as the control
station. (Refer to (2) (a) in this section.)
Standby system
(system B)
Redundant
CPU
Tracking cable
QnA
Normal
CPU
station
[Setting of the redundant CPUs]
1) Install network modules of function version D or later
to the redundant CPUs, and set one of them as a
control station.
2) Set the parameters for the redundant system using
GX Developer of version 8.18U or later.
Normal
station
AnU
Normal
CPU
station
[Setting of the previous control station]
1) Since the network module installed with an AnUCPU or
QnACPU cannot be a control station, change the status
to a normal station.
MELSEC-Q
Normal Q4AR Q4AR
station CPU CPU
Normal
station
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