Configuring Hardware and Communication Connections STEP 7.pdf

Networking Stations
Which Modules or Stations Must Be Loaded After a Change to a Network
Configuration?
If you change a configuration as follows ... ... you have to reload
Delete or add a network connection to a station (station All network gateways
equals network gateway)
Modify an interface address on the subnet (station equals Network gateways on the same subnet
network gateway) or
plug a module with its own MPI address into an S7-300
station in such a way that the MPI address of a network
gateway (next module inserted) is changed
Add or delete a network gateway All network gateways
Insert a module with a network connection in another slot All modules for this station
(station equals network gateway)
Add a subnet -
Delete a subnet (where network gateways are configured All network gateways
on this subnet)
Change a subnet ID If any network gateways are connected to
this subnet: All network gateways
S7 Subnet ID for an Online Connection via Network Gateways
If the network configuration together with all the routing information was
downloaded to the affected stations, you must also specify an S7 subnet ID to
access the remote station.
The S7 subnet ID that is requested by STEP 7 using dialog boxes is formed from
two numbers:
• A number for the project
• A number for the subnet
Both numbers can be determined via the properties dialog box of the subnet with
an existing network configuration. If you want to go online with a programming
device without a consistent project, you must know the subnet ID. The subnet ID is
printed out with the network configuration.
Configuring Hardware and Communication Connections with STEP 7
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