Siemens Automation System S7-400 - Manual (Page 100)

Networking
5-2
Automation System S7-400 Hardware and Installation
A5E00850741-01
5.1 Configuring 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.