Communication
3.2 Communication services
CPU 31xC and CPU 31x, Technical Data
Manual, 01/2006 Edition, A5E00105475-06
3-13
Number of connections for routing
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
319-3 PN/DP 2.4.0 Interface X1 configured as:
• MPI: Max. 10
• DP master: Max. 24
• DP slave (active): Max. 14
Interface X2 configured as:
• DP master: Max. 24
• DP slave (active): Max. 14
Interface X3 configured as:
• PROFINET: Max. 48
Requirements
• The station modules are "capable of routing" (CPUs or CPs).
• The network configuration does not exceed project limits.
• The modules have loaded the configuration data containing the latest "knowledge" of the
entire network configuration of the project.
Reason: All modules participating in the network transition must receive the routing
information defining the paths to other subnets.
• In your network configuration, the PG/PC you want to use to establish a connection via
network node must be assigned to the network it is physically connected to.
• The CPU must set to master mode, or
• when set to operate in slave mode, the Test, Commissioning, Routing functionality must
be enabled by setting the check box in STEP 7, in the
DP interface for DP slave properties dialog box.
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