Mitsubishi Electric MELSEC iQ-F Series - Structure of multicast mode

5 SYSTEM CONFIGURATION
5.1 Structure of CC-Link IE TSN Class B Devices and Ethernet Devices
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Structure of multicast mode
This mode indicates the availability of connection with a network configuration device when "Communication Mode" under
"Application Settings" is set to "Multicast".
When the communication speed for the master station is set to 1Gbps
The following table lists the availability of connection with a network configuration device when the communication speed for
the master station is set to 1Gbps.
: Connection available, : Connection available via an industrial switch, : Connection not available
S: Industrial switches (for CC-Link IE TSN Class B) can be used.
H: Industrial switches (for CC-Link IE TSN Class A) can be used.
*1 For a device station with a communication speed of 100Mbps, set "Communication Period Setting" to "Low-Speed".
*2 When the device is connected on the end side via the industrial switch as shown below, communication may not be possible depending
on the type of the device.
The communication will be enabled by configuring settings with the industrial switch so that the multicast frame (with multicast MAC
address 09:00:70:00:10:02 and 09:00:70:00:10:05) will not be transferred to the ports specified below.
*3 Since cyclic data is sent to the Ethernet device when the Ethernet device is connected to the master station with firmware version
"1.002" or earlier, communication may not be possible depending on the type of the Ethernet device.
*4 A connection cannot be established if the total cyclic data size of all device stations on the 100Mbps device side exceeds 2K bytes. This
includes the devices with a communication speed of 100Mbps that form a boundary between the communication speed of 1Gbps and
100Mbps. ( Page 124 Calculation of the total cyclic data size)
*5 When the firmware version of the master station is "1.002" or earlier, only one of P1 or P2 can be used.
*6 Use the devices that support multicast filtering for the local stations or remote stations on the master station side. To check whether
multicast filtering is supported or not, refer to the user's manuals for the devices used.
Precautions
When an industrial switch (for CC-Link IE TSN Class B) is used, check the industrial switch (for CC-Link IE TSN Class B)
specifications on the CC-Link Partner Association website (www.cc-link.org).
Device on the master station
side
(A device near the master
station)
Device on the end side (A device far from the master station)
Local station (CC-Link IE TSN
Class B device)
Remote station (CC-Link IE
TSN Class B device)
Ethernet device
1Gbps 100Mbps 1Gbps 100Mbps 1Gbps 100Mbps
Master station
(CC-Link IE TSN
Class B device)
1Gbps S
*2
S
*2
S
*1*2*5
SH
*2*3
SH
*2*3*5
Local station
(CC-Link IE TSN
Class B device)
1Gbps S
*2
S
*2
S
*1*2*4*6
SH
*2*6
SH
*2*6
100Mbps 
Remote station
(CC-Link IE TSN
Class B device)
1Gbps S
*2
S
*2
S
*1*2*4*6
SH
*2*6
SH
*2*6
100Mbps S
*1*2*4
SH
*2*6
Connection structure that cannot be communicated Port that prohibits multicast frame transfer
Device stations with communication speeds of 1Gbps and 100Mbps coexist. Connection port of the device station with 100Mbps
A local station and Ethernet device coexist. Connection port of the Ethernet device
The remote station and Ethernet device coexist.