Hello,

The IP Adress comes, most timesfrom the HW Configuration. If this is the case you need to change the IP-Address in the offline Project, compile it and load it into the CPU again.

An idea could be to check the Properties from the CP343-1 Lean. The newest version, 1CX10 v2.0 has 4 possibilities to set the IP. Check the Properties of the card. Depending on what you have selected the last time you downloaded the HW-Condig it could be one of the following settings:


·Set IP address in the "Properties – Ethernet Interface" dialog

This is the default setting. You specify the IP address during the networking of the Ethernet CP in the "Properties – Ethernet interface" dialog. The IP address of the CP is therefore fixed in the configuration.
The following also applies:

·This is the necessary setting to be able to work with PROFINET IO.

·With this option, you must configure the communication connections in the project engineering.

·Obtain an IP address from a DHCP server

If you select this option, the IP address is obtained from a DHCP 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. The client ID is a string with a maximum of 63 characters. Only the following characters can be used:

-a-z, A-Z, 0-9 and - (dash)

Requirements / Restrictions:
If you select this option, it is initially not possible to create a fully specified connection in the STEP7 project because the local IP address is not known.
You must therefore select "unspecified" with passive connection establishment as the connection type.

·Set IP address in the user program

With this option, you specify that the IP address is set over the user program interface (function block IP_CONFIG). This allows the IP address to be supplied dynamically during operation.
In this situation, communication connections are created only over the user program interface; configuring connections using STEP7 is not possible (relates to connections over TCP, ISO-on-TCP, UDP, ISO transport).
In multicomputing mode, you should also note that FB IP_CONFIG must run on the CPU that you assigned to the CP configured here in the "Addresses" tab.

·Set IP address using a different method

With this option, you specify that the IP address is set by other services outside STEP7.
In this situation, configuring connections using STEP7 is not possible (relates to connections over IP: TCP, ISO-on-TCP, UDP, ISO transport).

Watch out that by changing the IP Address of the CP it could be necessary that you need to change a couple of connections.

Hi INS,

Thanks for your very thourough discription! But I think you misunderstood.
The IP from the CP should not change but the remote IP should change, so the IP adress of the connected Server wich communicates with the CP card.

again thx for your help

Hello,

Okay then I misunderstood. but what is the Server for a device?

Hi INS,

an OPC connection would be a possibility but i'm sure the Remote adress is set fix into the CP or in the connected S7 CPU.

When i use the Siemens NCM S7 diagnostics tool (see picture), i see the connection to the Remote server, I also see the remote IP adress, but I can't change it.
I'm guessing that's because the CP card is still in run and no changes are possible in run (logical). But i'm also not able to findto change the IP adressoffline, and stopping the card at this time is no option.
I must be able to change the IP this sunday!

thx for your help