Siemens S7-300 - 8 Digital modules

&RQILJXULQJ
S7-300 Automation System, Hardware and Installation: CPU 312IFM - 318-2 DP
A5E00203919-01
5-47
([DPSOH&38['3DV03,DQG352),%86QRGHV
The figure below shows you an assembly with a CPU 31x-2 DP integrated in an
MPI subnet and at the same time operated as DP master in a PROFIBUS subnet.
S7-300
CPU
PS
CPU
S7-300
CPU
PS
CPU
PG
9
PROFIBUS subnetMPI subnet
S7-300 CPU
with DP interface
as DP master
RS 485-
Repeater
1
MPI addr. 2
MPI addr. 3
MPI addr. 4
MPI addr. 6
MPI addr. 5
OP 27
MPI addr. 7
MPI addr. 8
MPI addr. 0
S7-300
CPU
PS
CPU
S7-300
PS
CPU
OP 27
CPU
PS
DP-CPU
ET200M ET200M
ET200MET200M ET200MET200M
ET200BET200B
S5-95U
S5-95U
S5-95U
2
1
1
1
1
1
DP addr. 2
DP addr. 3
DP addr. 4
DP addr. 9 DP addr. 8
DP addr. 10 DP addr. 11
DP addr. 5
DP addr. 6
DP addr. 7
Figure 5-17 Example: CPU 314C-2 DP as MPI and PROFIBUS nodes
.H\WRQXPEHUVLQWKHILJXUH
 Terminating resistor inserted
 PG connected by means of a stub cable for maintenance purposes