Supplementary information
15.6 Communication services
CPU 410-5H Process Automation
246
System Manual, 09/2014, A5E31622160-AB
15.6.5
S7 routing
Properties
You can access your S7 stations beyond subnet boundaries using the programming device /
PC. You can use them for the following actions:
●
Downloading user programs
●
Downloading a hardware configurations
●
Performing test and diagnostic functions
Requirements
●
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 connected to the network gateway must receive routing information
which defines the paths to other subnets.
●
In your network configuration, the PG/PC you want to use to set up a connection via
gateway must be assigned to the network to which it is physically connected.
●
The CPU must be configured as the master.
S7 routing gateways: PN - DP
Gateways between subnets are routed in a SIMATIC station that is equipped with interfaces
to the respective subnets. The following figure shows CPU 1 (DP master) acting as router for
subnets 1 and 2.
Figure 15-2 S7 routing