External Power Supply Function - Mitsubishi Electric MELSEC Q Series Reference Manual

Cc-link ie controller network
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4.4.7

External power supply function

Power can be directly supplied from the outside to the CC-Link IE Controller Network module with external power
supply function.
Even if a CPU module power goes down in a network, data link will continue among normally operating stations
without being disrupted at the power-down station. (Loopback does not occur.)
Data link is also continued between more than one station where CPU module power has gone down.
(1) Without external power supply function
Loopback station
(2) With external power supply function
External power supply
Control
station
No.1
Normal
station
No.6
External power supply
(a) Precautions for operation
If the external power supply of a CC-Link IE Controller Network module with external power supply function is
powered on while a CPU module is off, the CC-Link IE Controller Network module with external power supply
function will not normally operate.
Start operations with both modules on.
134
Loopback station
Control
station
No.1
Normal
station
No.6
Down
External power supply
Normal
station
No.2
Normal
station
No.5
Down
External power supply
Normal
station
No.2
Down
Normal
station
No.5
No
communication
External power supply
Normal
station
No.3
Down
Normal
station
No.4
External power supply
Normal
station
No.3
Data link is not executable
Normal
between failed stations.
station
No.4
Data link is continued
between failed stations.

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