Mitsubishi Electric MELSEC Q Series Reference Manual page 134

(3) When adding a network to another network
A network will be added to another network in the following cases:
• After a network is divided into two due to cable disconnection, the cable is reconnected.
• After dividing or localizing a network to debug the system, the divided networks is to be reconnected into
one.
(a) When duplication of the control station is detected
Another network was added by mistake.
Cyclic transmission between
stations No.5 and No.6
Control station duplication occurs at two control stations.
Function
Cyclic transmission
Transient transmission
132
Control station
No. 6
Normal station
No. 5
Control station
No. 6
Control station
duplication
Sub-control station continues cyclic transmission.
Normal station
No. 5
The two control stations do not perform cyclic transmission.
The sub-control station performs cyclic transmission.
Available for all stations.
Control station
No. 1
Cyclic transmission among stations
No.1 to No.4
Normal station
No. 4
Sub-control
Control station
station No. 2
No. 1
Control station
duplication
Normal station Normal station
No. 4 No. 3
Operation
Normal station
No. 2
Normal station
No. 3