Siemens simatic c7-621 Hardware Installation Manual page 51

Example of an MPI Figure 3-4 shows the basic configuration of an MPI subnet using the rules
Subnet
listed above.
S7-300
C7
OP 25**
À 5
3 + 4
S7-300
OP 25
À
16
0
PG*
* Only during installation/maintenance connected via a tap line (with the default MPI address)
** Connected later to the MPI subnet (with default MPI address)
*** Apart from the MPI address (here address 7), the CP also has a PROFIBUS address
0 ... x MPI addresses of the nodes
Terminating resistor activated
Figure 3-4 Example of an MPI Subnet
C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
S7-300
6 7
S7-300
15 14
Configuring an MPI Network
S7-300
PG
9
8
S7-300 FM
OP 25
13 12 11
CP
PROFI-
BUS
subnet***
10
3-7