Skip to content
S7.NET+ -- A .NET library to connect to Siemens Step7 devices
Branch: develop
Clone or download
mycroes Merge pull request #167 from mycroes/bit-arrays
Fix incorrect length when reading BitArray
Latest commit 2fbf659 Jul 17, 2019


A .NET Library for Siemens S7 Connectivity


S7.Net Plus is a continuation of the work done on the S7.Net project by Juergen1969. I found the library simple and effective, but the project has languished unchanged since late 2009.

I was doing some automation work already and saw a few places where the code base could be improved. Because Juergen did not respond to my request for committing code, I decided to pick up where he left off here on GitHub.


Check the Wiki and feel free to edit it:

S7.Net Plus has a User Manual, check it out.

Supported PLC

  • Compatible S7 PLC (S7-200, S7-300, S7-400, S7-1200, S7-1500)

Supported frameworks

  • .NET Framework 4.5.2 and higher
  • .NET Standard 1.3 (.NET Core 1.0, UWP 10.0, Xamarin, ...)
  • .NET Standard 2.0 (.NET Core 2.0, .NET Framework 4.6.1)


You need at least Visual Studio 2017 (you can download the Community Edition for free).


PM> Install-Package S7netplus

Latest build (Appveyor)

Build status

Running the tests

Unit tests use Snap7 server, so port 102 must be not in use. If you have Siemens Step7 installed, the service s7oiehsx64 is stopped when running unit tests. You have to restart the service manually if you need it.

You can’t perform that action at this time.