Communication
4.2 Communication services
S7-400 Automation System, CPU Specifications
Manual, 10/2006, 6ES7498-8AA04-8BA0
4-13
4.2.7 Routing
Properties
You can access other stations on other subnets with the programming device / PC of your
S7 stations. You can use this for the following actions:
● Downloading user programs
● Downloading a hardware configuration
● Performing testing and diagnostics functions
Note
If you use your CPU as I-slave, the routing function is only possible when the
DP interface is switched to active In STEP 7, set the Test, Commission Routing check
box in the properties dialog of the DP interface. For detailed information, refer to the
Programming with STEP 7
manual, or directly to the
STEP 7 Online Help
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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