Siemens S7-400 Configuring a Network, Subnets, Same Configuration, Multipoint Interface MPI

Networking

5.1Configuring a Network

Subnets

You can connect an S7-400 device to various subnets:

•Via Simatic Net CP Ethernet to an Industrial Ethernet subnet

•Via Simatic Net CP PROFIBUS to a PROFIBUS-DP subnet

•Via the integrated MPI interface to an MPI subnet

•Via the integrated PROFIBUS-DP interface to a PROFIBUS DP subnet

Same Configuration

We recommend you use the same bus components as for a PROFIBUS DP network configuration when configuring an MPI network. The same configuration rules apply.

Multipoint Interface (MPI)

This interface of the CPU uses a Simatic S7-specific protocol for the communication with programming devices (by means of STEP 7), operator panels, and other S7 CPUs. The bus structure corresponds to PROFIBUS.

Configuring Communication

In order that the individual nodes of an MPI or PROFIBUS-DP network can communicate with each other, you must assign MPI or PROFIBUS-DP addresses to them. The Manual Configuring Hardware and Communication Connections STEP 7 describes how to assign these addresses and what you must take into account.

All the CPU-related data you need to know to configure communication can be found in the Reference Manual CPU Data.

5-2	Automation System S7-400	Hardware and Installation
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