Shared Libraries The support for the Shared Libraries app part type is discarded and removed from PLCnext Technology firmware from version 2025.0. It can happen that an exe file integrated in the app container, such as a Command Line Tool, brings its own Shared Libraries with it and needs them for its… Read More
Command Line Tools A Command Line Tools app part makes it possible to integrate functionalities (cmd tools) into a system that are usable via the command line and that can be started from a shell without specifying the full path to the tool executable binary. Necessary additions… Read More
Update Configurations The update process is shown in the following figure: To update an app you need only to install the app container which contains the new app version (without uninstalling the old app version). The update is detected automatically when: An app is… Read More
Example of a complete app_info.json To make it easier for you to create a correct JSON file, you can use the following JSON schema: { “$schema”: “https://raw.githubusercontent.com/PLCnext/App-Info-Schema/refs/heads/main/app-info-schema.json”, “plcnextapp”: { … } } If you use a code editor that supports JSON… Read More
PLCnext Control Solution A PLCnext Control Solution contains commonly a complete PLCnext Engineer project configuration as an app part. A PLCnext Control Solution is also called solution for short. The user of a solution does not need any programming knowledge to use the app. A solution is transferred directly from the PLCnext Store… Read More
OCI container The OCI container app part type is supported in the PLCnext Technology firmware from version 2025.0. This app part provides the possibility for simplified integration and run of OCI (Open Container Initiative) container images of apps on the PLCnext Technology device. For this topic the container engine… Read More
App parts The app container can contain various app parts. This allows different app types to be implemented. The app parts are entered as optional entries in the app description. If these parts are present, the PLCnext Runtime (AppManager) reacts accordingly. The app description file must contain… Read More
Folders and PLCnext Technology environment variables The following table lists environment variables on the controller, representing directories that are required for app administration. The values of these environment variables are set to the defaults shown below, using information in the file /etc/plcnext/Device.acf.settings. These default values do not need to be… Read More
PLCnext Technology Extensions Extensions of the runtime can be integrated into a system in the form of an app. With a PLCnext Technology Extension, the runtime can be extended by the following elements: A process dependent on the runtime (process) A component (component) A Shared Library (library), which usually… Read More
Linux Daemons The support for the Linux Daemons app part type is discarded and removed from PLCnext Technology firmware from version 2025.0. From version 2025.0, the OCI container app part type is supported in the PLCnext Technology firmware. A (Linux) Daemon can be integrated into a system in the form of an app. Read More
