Siemens S7-300 appendix Routing network nodes MPI DP Ethernet, Number of routed connections, 2 DP

Communication

3.2 Communication services

Routing network nodes: MPI – DP - Ethernet

CPU 1

(e.g. 315-2 DP)

MPI	DP
	(master)

CPU 2

(317-2 PN/DP)

MPI/DP PN

(active slave)

CPU 3

(317-2 PN/DP)

PN

Subnet 2 (PROFIBUS) Subnet 3 (PROFInet)

Subnet 1 (MPI)

PG

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

3-12	CPU 31xC and CPU 31x, Technical data
	Manual, Edition 08/2004, A5E00105475-05