Access Via Service Interface X127; Access Via Profinet Interface X150 - Siemens SINAMICS S120 Function Manual

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Access via service interface X127

The web server is accessed per default via the service interface X127. The service interface

has the following default setting:

● IP address: 169.254.11.22

● Subnet mask: 255.255.0.0

● Accessing the web server

Access via the service interface is activated as default setting in the web server.

● Communication

Communication is performed in the factory setting via an HTTP connection.

Interface X127 can also be connected to an external WLAN access point, and from this an IP

address can be sourced via DHCP. This is just a temporary situation, and is only used for

commissioning and/or diagnostics with mobile devices. The subsequently described security

notes must be carefully observed when doing this.

Additional notes when using interface X127

Ethernet interface X127 is intended for commissioning and diagnostics, which means that it

must always be accessible (e.g. for service).

Furthermore, the following restrictions apply to X127:

● Only local access is permissible.

● No networking - or only local networking is permissible in a locked control cabinet.

If it is necessary to remotely access the electrical cabinet, then additional security measures

must be applied so that misuse through sabotage, data manipulation by unqualified persons

and intercepting confidential data is completely ruled out (also see "Industrial security

(Page 27)").

Alternatively, you can access the web server via PROFINET interface X150.

It is not permissible that the IP addresses of the service and PROFINET interfaces are in the

same subnet (see Chapter "Access via service interface X127 (Page 717)")

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Function Manual, 06/2019, 6SL3097-5AB00-0BP2

Software manipulation when using non-encrypted connections (HTTP)

The HTTP protocol transfers data without encryption. This facilitates password theft, for

example, and can lead to data manipulation by unauthorized parties and thus ultimately to

● Limit access to HTTPS connections so that all data is transferred in encrypted form.

13.2 Fundamentals