Installing and Starting the Ethernet CP with STEP 7

IP Configuration Tab

In this tab, you can decide the route and the method with which the IP address of the local S7 station is obtained and assigned.

V5.2.1 With the options available here, it is also possible to assign IP addresses dynamically outside the STEP 7 configuration.

Table 2-2 Options in the “IP Configuration” Tab

Option

Meaning / Effect

 

 

S Set IP address in the

This option is the default.

“Properties – Ethernet

It means that the IP address is set during the networking of the

Interface” dialog

Ethernet CP. The IP address of the CP is therefore fixed in the

 

 

configuration.

 

You must select this option if you want to configure specified

 

connections.

 

 

S Obtain an IP address from a

If you select this option, the IP address is obtained from a DHCP

DHCP server

server when the S7 station starts up.

 

The DHCP server is informed of the MAC address of the CP or the

 

client ID that you can enter here.

 

Requirement / Restriction:

 

If you select this option, it is initially not possible to create a fully

 

specified connection in the STEP 7 project because the local IP

 

address is not known.

 

You must therefore select “unspecified” with passive connection

 

establishment as the connection type.

 

Please not the following:

 

If the connections are configured over the interface in the user

 

program, you must use the option “Set IP address in the user

 

program” as described below. This also applied if the IP address is

 

obtained from a DHCP server.

 

 

SIMATIC NET NCM S7 for Industrial Ethernet

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Release 6/2003

C79000–G8976–C129–07

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Siemens NCM S7 appendix IP Configuration Tab, Option Meaning / Effect

NCM S7 specifications

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