Mitsubishi Electric Melsec QJ71LP21 - Simple Dual-Structured System (High Performance Model QCPU and Process CPU)

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MELSEC-Q
2 SYSTEM CONFIGURATION
2.1.3 Simple dual-structured system (High Performance model QCPU and Process CPU)
In a simple dual-structured system, "regular" and "standby" network modules are
installed in each CPU module, so that if the regular network is down, the data link can
still be continued by switching to the standby network through link data refresh.
For details, refer to Section 7.7.
POINT
Simple dual-structured system cannot be configured with the Basic model QCPU,
Redundant CPU, and Universal model QCPU. These CPUs are applicable for a
single network system.
Network No. 2
Network No. 1
Control station Normal station Normal station
Power supply
Standby
network
Regular
Standby
Power supply
Regular
Standby
Power supply
Regular
Standby
Power supply
Regular
Standby
Power supply
Regular
Standby
Regular
network
Q25H
CPU
Q25H
CPU
Q25H
CPU
Q25H
CPU
Q25H
CPU