Siemens SIMATIC TIWAY 1 Especificaciones Pagina 24

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Getting Started
2–9
Getting Started
The three types of networks can be combined to solve many different applications.
Even though the configurations can be combined in an application, each network
remains independent. The master station from one network cannot request data
directly from slave stations on another network. This does not mean you cannot
obtain data from these networks, you can. It just requires more than one interface for
that slave station. The following diagram shows a simple application using all three
types of networks, some with multiple interfaces for each station.
Combination
Network
2
1
3
1 PLC as Master Network
2 – Host as Master Network
S Master can initiate read or write
with any slave station
S PLC with DCM as master
S Full range of slave stations
available
S Host computer (or other
intelligent device) as master
S Requires DirectNET program
in the host
S Full range of slave stations
available
3 Peer as Master Network
S Two stations only
S Only DL405 DCMs
S Either station can initiate a
request
Combination
Networks
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