TwinCAT AdsToJava

This library is intended for use in ADS client applications written in the Java programming language. It was tested on Windows 10 and Tc/BSD 13.2. The Linux support is still in the beta phase, as detailed below.

It consists of two parts:

1. Windows: AdsToJava-3.dll: A JNI-based wrapper (Java Native Interface) for the TcAdsDll.dll.

   Tc/BSD: libAdsToJava-3.so: A JNI-based wrapper (Java Native Interface) for the libTcAdsDll.so.

2. TcJavaToAds-3.1.0.jar: A Java archive that provides a straightforward way to call this JNI.

Requirements on Windows

For an optimal development experience, we recommend the use of Visual Studio Code. The Maven project that contains the Java source code should also be compatible with other Java IDEs like Eclipse, IntelliJ and Netbeans.

To build this library, the following programs must be installed on your system:

• A Java Development Kit, for example, the Microsoft Build of OpenJDK
• Apache Maven
• Microsoft Visual Studio with the C++ workload (The 2022 version is recommended)
• CMake (Might already be installed as a Visual Studio component)
• The TwinCAT 3 automation software from Beckhoff Automation

Additional dependencies for the full build:

• Clang Format (Might already be installed as a Visual Studio component)
• NodeJS for spell checking based on cspell

Requirements on Tc/BSD

To build this library, the following additional packages must be installed on your system:

doas pkg install bash git openjdk8 maven cmake ninja os-generic-userland-devtools

Additional dependencies for the full build:

doas pkg install node18 npm-node18 llvm

Build

Run one of the following files using cmd.exe:

bootstrap.bat

bootstrap_full.bat

Or execute one of these commands if you are on Tc/BSD or using Git Bash on Windows:

bash ./bootstrap.sh

bash ./bootstrap_full.sh

The full build also enables all warnings and runs the tests, clang-tidy, code spell check and automated code formatting. Before running the tests you should activate the TestPlc project.

Note: On windows, the build scripts always compile an x64 and win32 version of the AdsToJava-3.dll. Depending on your system, one of them is copied to the dist/ directory. You can find the other version in the build*/Release directory. There is no 32 bit version of the Tc/BSD operating system so there is no need for a 32 bit version of this library on Tc/BSD.

Samples

The samples directory contains sample programs that use the TcJavaToAds library to communicate with a PLC. They depend on the SamplesPlc project.

Documentation

Is generated during the build process.

Folder structure

Overview of the folder structure of this repository:

.
├── .vscode          # Configuration files for Visual Studio Code
├── adslib_for_linux # Contains the open-source ADS library that is used where the TcAdsDll is not available
├── dist             # Generated documentation, compiled library and samples
├── run              # Helper scripts
├── cpp              # C++ source files
├── src              # Java source files and tests
├── samples          # Java source files for the samples
├── build*           # Full C++ build output: x64 (and win32)
├── target           # Full Java build output including coverage report
├── plc              # PLC projects for the tests and samples

Status of the Linux support

Beckhoff has an open-source ADS library that provides an API to communicate with TwinCAT devices via TCP/IP. This makes it possible to port the "AdsToJava" library to systems without "TcAdsDll" support.

Current status: Everything compiles, the 02 sample was updated to work with the open-source ADS library on Linux.

Known limitations:

1. For many functions, the open-source ADS library only supports the newer version (*Ex, or *Ex2).
2. AdsGetDllVersion, AdsGetLocalAddress, AdsAmsPortEnabled*, AdsAmsRegisterRouterNotification, and AdsAmsUnRegisterRouterNotification are not supported by the open-source ADS library.

Getting started:

The open-source ADS library was added as a Git submodule called "adslib_for_linux". Execute this command after cloning this repository to download the contents of the submodule:

git submodule update --init --recursive

It is compiled automatically by the bootstrap.sh, you don't need to do that yourself.

Since there is no TwinCAT AMS Router on systems without "TcAdsDll" support, you have to use adsAddLocalRoute to define the association between the AMS NetId and IP address on your target system. This is, for example, demonstrated in the this sample.

You need an ADS route between your Linux system and your target system. If you don't have a route, the target system will refuse your ADS connection. Adding routes is explained elsewhere, here are a few resources for you:

• https://github.com/Beckhoff/ADS?tab=readme-ov-file#prepare-your-target-to-run-the-example

• A simple option is to use the adstool:

  ./adslib_for_linux/build/AdsTool/AdsTool <target_ip> addroute --addr=<linux_ip> --netid=<linux_netid> --password=<target_password>

Platform support diagram

flowchart LR
    subgraph AdsToJava["AdsToJava-3.dll"]
    end
    subgraph libAdsToJava["libAdsToJava-3.so"]
    end
    subgraph TcJavaToAds["TcJavaToAds-3.1.0.jar"]
    end
    TcJavaToAds --"Windows"--> AdsToJava
    TcJavaToAds --> libAdsToJava
    AdsToJava --> TcAdsDll.dll
    libAdsToJava --"Linux"--> libads.so
    libAdsToJava --"Tc/BSD"--> libTcAdsDll.so

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Contributing

The main purpose of this repository is to continue evolving this library, adding features and making it easier to use. Development of TwinCAT AdsToJava happens in the open on GitHub, and we are grateful to the community for contributing bugfixes and improvements.

Security contact information

To report a security vulnerability, please contact product-securityincident@beckhoff.com. Read the Coordinated Disclosure page for more information.

License

TwinCAT AdsToJava is MIT licensed.