Mitsubishi Electric MELSEC Q Series Reference Manual page 119

(6) Precautions when configuring a multiple CPU system
Set a CPU module connected to an Ethernet device as a control CPU of the CC-Link IE Controller Network
1
module performing the IP packet transfer.
Any relay station on CC-Link IE Controller Network can be served as a control CPU of the CC-Link IE Controller
2
Network module transferring the IP packet.
When multiple CC-Link IE Controller Network modules with the same network number are connected to one
3
system, the CC-Link IE Controller Network module with the smallest slot number transfers the IP packet.
To transfer the IP packet, connect the Ethernet device to a control CPU of the CC-Link IE Controller Network
module with the same network number and the smallest slot number.
CPU module connected to
an Ethernet device
Ethernet device
(request source device)
Ethernet
Ethernet device
(request source device)
CPU module on
CC-Link IE Controller Network
(No restrictions on the control CPU)
Control
CC-Link IE Controller Network
3
Module mounted on
the smallest slot No.
Ethernet
Control
Same network No.
CC-Link IE Controller
Network
CHAPTER 4 FUNCTIONS
Ethernet device
(request destination device)
Ethernet
117
4