Change of IP address at TP1900Pro

Hi Guys,

One of the Simatic Panel TP 1900Pro which is connected via Mobile connection box was assigned x.x.x.229 which has a Remote Operate Client and displays the Remote Operate Server.

IP address of the Client was changed to e.g: x.x.x.12 but it doesn't connect to the server.

As soon as IP is changed back to .229, it starts working without a problem.

In the TIA Hardware, only the mobile connection box is configured not the TP 1900Pro panel.

Is there anything/anywhere to set to change the IP address?

Thanks in advance.