Mitsubishi Electric MELSEC iQ-F FX5 Series User Manual page 81

■Coexistence of line and star topologies
Line and star topologies can be mixed according to the availability of connection as described below.
• Up to eight slave stations of authentication Class B can be connected to the transmission path from the master station to
the authentication Class B device of the end.
• To connect an authentication Class B device, line topology or star topology using P1 or P2 of the master station is required.
(The authentication Class B device cannot be connected to the authentication Class A device.)
No.1
No.0
Class B
Class B
No.0: Master station
No.1: Slave station (1st station)
No.8: Slave station (8th station)
No.9, No.10: Remote station
Class A: Authentication Class A device
Class B: Authentication Class B device
• Connection cannot be made if the total cyclic data size of all slave stations on the authentication Class A device side that
form a boundary between authentication Class B and authentication Class A exceeds 2K bytes.
No.0 No.1
Class B Class B
No.2
Class B
No.0: Master station
No.1, No.2: Local station
No.3, No.4, No.5, No.6, No.7, No.8, and No.9: Remote station
Class A: Authentication Class A device
Class B: Authentication Class B device
 Set the total cyclic data size within 2K bytes.
No.8
Class B
... ...
No.3 No.4
Class B Class B
Ò
No.5 No.6
Class A Class A
5.2 Structure of Authentication Class B/A Devices and Ethernet Devices
No.9
Class A
General-purpose
switching hub
Ò
No.7
General-purpose
Class A
switching hub
No.8
Class A
No.9
Class A
5 SYSTEM CONFIGURATION
No.10
Class A
5
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