Siemens S7-400 Optical PROFIBUS-DP Network in Partyline Topology, Transmission Rate

Networking

Optical PROFIBUS-DP Network in Partyline Topology

The optical PROFIBUS-DP network with nodes that have an integrated fiber-optic cable interface has a partyline topology. The PROFIBUS nodes are interconnected in pairs by means of Duplex fiber-optic cables.

Up to 32 PROFIBUS nodes with a fiber-optic cable interface can be series-connected in an optical PROFIBUS-DP network. If a PROFIBUS node fails, as a result of the partyline topology none of the downstream DP slaves can be accessed by the DP master.

Programming	S7-400 with IM 467 FO	ET 200M with	Other field devices without
device/PC/OP		IM 153-2 FO	fiber-optic cable interface
PROFIBUS
cable
	Distances between 2
OBT	nodes:		OBT
	Plastic fiber-optic cable up
	to 50 m
	PCF fiber-optic cable up to		Other
	300 m
			nodes
	Optical PROFIBUS-DP

Figure 5-13 Optical PROFIBUS-DP Network with Nodes that have an Integrated Fiber-Optic Cable Interface

Transmission Rate

The following transmission rates are possible when the optical PROFIBUS-DP network is operated with a partyline topology:

•9.6 kbps

•19.2 kbps

•45.45 kbps

•93.75 kbps

•187.5 kbps

•500 kbps

•1.5 Mbps

•12 Mbps

Automation System S7-400	Hardware and Installation	5-23
A5E00850741-01