Protocol Stack

A protocol stack is traditionally organized into layers, each with distinct responsibilities, working together to facilitate seamless communication across a network. The classic structure is often conceptualized using models like the OSI (Open Systems Interconnection) model or the TCP/IP model, which illustrate how data moves between devices. 

Each layer operates independently yet collaboratively, adhering to standardized protocols. This modular design simplifies troubleshooting and enhances compatibility, as changes in one layer do not affect others. In the TCP/IP model, some layers like Session and Presentation are merged into the Application Layer, reflecting a more streamlined, practical approach. 

Industrial communication relies on specific protocols to ensure seamless data exchange and control in automation systems. Protocol stacks for industrial communication must meet stringent requirements to ensure reliable and efficient operation in demanding environments. They must provide real-time capabilities for precise control and synchronization, with low latency and high determinism. Robust error detection and correction mechanisms are essential to maintain data integrity in harsh conditions with electromagnetic interference. The stacks must support scalability to integrate diverse devices and adapt to system expansions. Security features like encryption and authentication are critical to protect against cyber threats. Additionally, compatibility with existing systems and interoperability across different protocols ensure seamless communication within complex industrial automation networks. 

These protocols are categorized into Fieldbus systems, Industrial Ethernet, and IIoT (Industrial Internet of Things) technologies, each suited to different use cases. 

Fieldbus protocols are used for real-time control and communication in industrial devices such as sensors and actuators. They operate on a decentralized network architecture, ideal for environments with strict timing requirements. Key protocols include: 

Industrial Ethernet or Real-Time Ethernetprotocols combine high-speed communication with determinism, making them ideal for more complex automation systems and real-time data processing. Leading protocols include: 

The Industrial Internet of Things emphasizes connectivity, analytics, and remote management in smart manufacturing systems. Key IIoT protocols include: 

Each protocol plays a crucial role in modern industrial systems, with Fieldbus enabling local control, Industrial Ethernet driving high-speed deterministic automation, and IIoT technologies empowering data-driven decision-making and predictive maintenance. Together, they form the backbone of smart manufacturing and Industry 4.0 initiatives. 

Hilscher's netX product family not only stands for pure chip technology, but also for the idea of multi-protocol capability of a single communication solution consisting of hardware and software. 

The protocol firmware for the netX communication controllers is the result of Hilscher's core competence and expertise in communication technology. Over the years, it has steadily evolved into a very broad portfolio of controller and device protocol stacks, including engineering tools for simple and certifiable integration of an automation device into a wide variety of networks. Hilscher benefits from its involvement in numerous technical working groups and committees, which ensures that the netX firmware is always at the cutting edge of technology and is continuously developed further. 

Hilscher provides a full featured set of netX firmware variants for the following industrial communication protocols and standards: CANopen, PROFIBUS, PROFINET, Modbus/TCP, MQTT, OPC UA, EtherCAT, Sercos, VARAN, EtherNet/IP, DeviceNet, CC-Link, CC-Link IE, Ethernet POWERLINK,