REST data interface Introduction In this topic you will learn about the REST-based approach of PLCnext Technology which is utilized to exchange data via HTTP with the PLCnext Control’s firmware and with data in the Global Data Space (GDS). REST, or REpresentational State Transfer, is a software architecture style consisting of guidelines and best practices for… Read More
REST data interface – Variables Note: Phoenix Contact reserves the right to make changes and additions in further versions that might lead to incompatibilities. Therefore it is highly recommended to call this REST data interface out of your application explicitly with the version used during development, not with the latest key. Read Variable(s) This command… Read More
Modbus TCP client Available from firmware 2024.6 Modbus is a long-living communication standard in industrial automation. It has been developed to communicate via TCP and meeting security needs. There are different Modbus implementations available, e.g. as a function block (available in the PLCnext Store). But using a… Read More
Communication via MQTT broker Available from firmware 2024.0 LTS PLCnext devices running firmware 2024.0 LTS or newer can communicate not just to Proficloud but to any MQTT broker, e.g. those provided by Amazon Warehouse Services (AWS) or Microsoft Azure. This implementation of an MQTT client directly within the firmware is one of many possibilities,… Read More
Using gRPC communication in PLCnext Technology Short introduction to gRPC gRPC is a modern open source high performance Remote Procedural Call (RPC) framework. Initially developed at Google and now lead by the Cloud Native Computing Foundation. It is very flexible and user-friendly, it can easily put in communication… Read More
Update via OPC UA® using UaExpert Available from firmware version 2022.0 LTS to 2024.6 – from firmware 2025.0 or newer see Updating apps and firmware This topic shows how to update a project or the firmware of a PLCnext Control device using the OPC UA® sample client UaExpert. Note: To perform the following steps the user role SoftwareUpdate or… Read More
OPC UA device information The Device Integration (DI) namespace In compliance with the “OPC UA for Devices” OPC UA Companion Specification, the eUA server provides the following nodes: Node Meaning DeviceManual Path or URL to the user manual. DeviceRevision General revision status of… Read More
RSC Device Interface Services The RSC Device Interface Services provide a range of functions for accessing properties of the operating system and the controller hardware. You can call the information with the following interfaces and defined parameters. The following headers are required to use the service; integrate these… Read More
RSC documentation This is a reference of the available documentation regarding the RSC services that are built into the PLCnext Runtime System. Note: From firmware release 2022.0 LTS on, some RSC services can also communicate via gRPC. The respective protocol buffer definitions (.proto files) can be downloaded from our GitHub repository where you find on all about using… Read More
RSC IDataLoggerService2 Available from 2020.6 Introduction The DataLogger is a service component that transfers real-time data from the GDS to a database for recording and storage purposes. When starting and stopping the PLCnext Technology firmware, a configured DataLogger session is started and stopped automatically. The DataLogger then collects… Read More
