Example Of An Mpi Subnet - Siemens CPU 313C Hardware And Installation Manual

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The figure below shows you the block diagram of an MPI subnet.
S7-300
2
SF SF
BUSF BUSF
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RUN RUN
STOP STOP
PS
CPU
OP 27
MPI addr. 2 MPI addr. 1
1
S7-300
3
PS CPU CPU
MPI addr. 13
1
5
MPI addr. 0
PG
Figure 5-14 Example of an MPI subnet
Terminating resistor inserted

 S7-300 and OP 27 have subsequently been connected to the MPI subnet using their MPI default
address.
CPU 31xC, 312, 314, 315-2 DP

You can also assign MPI addresses of CPs/FMs for these CPUs.
CPU 317-2 DP
CPs and FMs do not have their own MPI address in this CPU.
 In addition to the MPI address, the CP also has a PROFIBUS address (7 in this case).
 Connected via a stub cable using the default MPI address for commissioning/maintenance only
S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
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S7-300 S7-300
3
3
PS
CPU CPU PS
2
MPI addr. 3
S7-300
3
PS CPU CPU
OP 27
MPI addr. 12 MPI addr. 11
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S7-300
3
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CPU CPU PS
MPI addr. 4
MPI addr. 5 MPI addr. 6 MPI addr. 7
S7-300
3
PS
OP 27
MPI addr. 10
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3
CPU CPU CP
PROFIBUS
3
CPU CPU FM
MPI addr. 8 MPI addr. 9
4
5-43