Siemens Simatic S7-300 - Page 40

Communication
3.2 Communication services
CPU 31xC and CPU 31x, Technical data
3-12 Manual, Edition 08/2004, A5E00105475-05
Routing network nodes: MPI – DP - Ethernet
CPU 1
(e.g. 315-2 DP)
PN
Subnet 3 (PROFInet)
PN
PG
Subnet 2 (PROFIBUS)
DP
(master)
MPI
Subnet 1 (MPI)
MPI/DP
(active slave)
CPU 2
(317-2 PN/DP)
CPU 3
(317-2 PN/DP)
Number of routed connections
The CPUs with DP interface provide a different number of connections for the routing
function:
Table 3-5 Number of routing connections for DP CPUs
CPU As of firmware version Number of connections for routing
31xC, CPU 31x 2.0.0 Max. 4
317-2 DP 2.1.0 Max. 8
31x-2 PN/DP 2.2.0 Interface X1 configured as:
• MPI: Max. 10
• DP master Max. 24
• DP slave (active): Max. 14
Interface X2 configured as:
• PROFINET Max. 24