Siemens S7-300 appendix Requirements

Communication 3.2 Communication services

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.

CPU 31xC and CPU 31x, Technical data	3-13
Manual, Edition 08/2004, A5E00105475-05