Assembling An Mpi Subnet Or Profibus-Dp Subnet - Siemens S7-400 Installation Manual

Assembling the M7-400
Connecting Mass Storage Modules (MSM)
Pin assignments of the parallel interface of the MSM 478 mass storage module can
be found in the chapter on M7-400 expansion of the Reference Manual.
Connecting the Short AT Card
The interface pin assignments of short AT cards which you intend to use can be
found in the corresponding documentation.
8.6

Assembling an MPI Subnet or PROFIBUS-DP Subnet

2 Subnets
With the M7-400, you can
• Assemble an MPI subnet via the MPI;
• Assemble a PROFIBUS-DP subnet with an M7-400 master.
Chapter 7 explains how to assemble one of these subnets and what you must take
into account.
Note Relating to the M7-400
To be able to connect an M7-400 to a PROFIBUS-DP subnet as the master, it is
necessary to plug an IF 964-DP interface submodule either directly into the
CPU 486-3/CPU 488-3, or into an EXM 478 expansion module belonging to the
CPU.
Example of Operation in 2 Subnets
Shown in Figure 8-16 is an example of a configuration with M7-400 CPU,
integrated in an MPI subnet, and simultaneously acting as DP master in a
PROFIBUS-DP subnet.
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S7-400 and M7-400 Programmable Controllers Hardware and Installation
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