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SIMATIC PCS 7 TeleControl system architecture 9

Topologies

Basic topologies

Differently structured telecontrol networks can be implement-

ed in the wide area network (WAN) based on the following

four basic topologies.

Media versions

Depending on the support provided by the selected telecon-

trol protocol, various transmission media are available for

these basic topologies, e.g. dedicated line, private wireless

networks, mobile radio networks, dial-up networks (wire-

less/landline), DSL over Internet.

Some of these media versions are shown in the example of the

star topology.

Combinations of basic topologies and media versions

Through a combination of several basic topologies of the

same or different media versions, it is additionally possible to

design more complex network topologies, even with redun-

dant communication paths.

This allows adaptation to the respective local conditions and

to the existing infrastructure.

Point-to-

point

Multi-point Star Ring

Star via

dedicated line

Star via

wireless

Dial-up

network via

wireless

Star via

Internet

Star +

multi-point

Complex network structure,

example of SINAUT ST7/DNP3

communication

Complex network structure,

example of IEC 870-5-104

communication

Nodes

Path

redundancy,

1 medium

Path

redundancy,

2 media