Ip Configuration; Points To Note About Ip Configuration; Restart After Detection Of A Duplicate Ip Address In The Network; Ip Routing - Siemens S7-1500 Operating Instructions Manual

4.3

IP configuration

4.3.1

Points to note about IP configuration

Configured S7 and OUC connections cannot be operated if the IP address is assigned using DHCP
Note
If you obtain the IP address using DHCP, any S7 and OUC connections you may have
configured will not work. Reason: The configured IP address is replaced by the address
obtained via DHCP during operation.
4.3.2

Restart after detection of a duplicate IP address in the network

To save you timeconsuming troubleshooting in the network, during startup the CP detects
double addressing in the network.
Behavior when the CP starts up
If double addressing is detected when the CP starts up, the CP changes to RUN and cannot
be reached via the Ethernet interface. The ERROR LED flashes.
4.3.3

IP routing

IP routing via the backplane bus
The CP supports static IP routing (IPv4) to other CM 1542-1 / CP 1543-1. You can use IP
routing, for example, for Web server access by lower-level modules.
With IP routing, the data throughput is limited to 1Mbps. Remember this in terms of the
number of modules involved and the expected data traffic via the backplane bus.
Configuration
You can activate the IP routing in STEP 7 via the function "IP routing between
communication modules". In the security settings, the corresponding function is called "IP
routing via the backplane bus". When you activate the function, additional IP firewall rules
are created which you can modify in the advanced firewall mode of the security settings.
IP routing runs via the configured default router. If you use several CPs in a station, of the
modules in the station only one may be configured as a router.
CP 1543-1
Operating Instructions, 05/2017, C79000-G8976-C289-07
Configuration, programming
4.3 IP configuration
35