Automation Technology

Automation technology represents a significant leap forward in the way tasks are performed across various areas, aiming to reduce the need for human intervention by embedding predetermined decision-making criteria and actions within machines. This technological paradigm shift has been instrumental in enhancing the speed, accuracy, and efficiency of manufacturing and production processes. Automated technology excels at executing repetitive tasks with a level of precision that surpasses human capabilities, which is crucial in minimizing errors and maximizing output.

There are various levels of complexity within automation technology, such as:

Basic automation technology

Basic automation technology, also known as task automation, streamlines work by taking over simple, repetitive tasks, such as conveyor belts in manufacturing. This form of automation is crucial for digitizing work, as it allows for the centralization and streamlining of routine tasks, such as using shared messaging systems instead of relying on disconnected information silos. By automating these tasks, organizations can save time and direct their focus towards more complex activities that require human skills like decision-making and problem-solving.

Process automation technology 

Process automation technology encompasses the use of various technological tools and software to automate repetitive and manual tasks within manufacturing processes. This technology aims to minimize human intervention, thereby increasing efficiency, speed, and accuracy in executing routine tasks. In manufacturing process automation technology involves the use of control equipment to perform operations on products, aiming to improve production speed or quality while minimizing labour requirements. This technology encompasses various forms of automation, including the use of production management software or robotic tools that operate factories, assisting with tasks such as processing and assembly.

Intelligent automation technology

Intelligent automation technology couples traditional automation techniques with AI and machine learning (ML) capabilities. Intelligent automation enables machines to learn from past data, make decisions, and adapt to changing circumstances, thus handling more complex tasks that go beyond simple rule-based actions. Intelligent automation facilitates efficient asset management and maintenance. By employing interconnected sensors and the Industrial Internet of Things (IIoT), companies can optimize asset usage, maintenance, and prevent costly leakages. Predictive maintenance can forecast potential equipment failures, schedule maintenance tasks proactively, and alert staff to anomalies, thereby reducing manual checks and associated financial and environmental costs.

At the heart of these automation technology lie sensors and actuators, controllers, and communication networks, each playing a pivotal role in the seamless operation of automated tasks. These components are briefly explained below:

Sensors and actuators

Sensors act as the vigilant eyes of automated systems, meticulously monitoring environmental parameters and signalling any changes that occur. These devices are adept at converting various physical phenomena - such as temperature, pressure, or proximity - into electrical signals that can be interpreted by control systems. Actuators, on the other hand, function as the limbs of automation, responding to the electrical signals provided by sensors and executing physical actions accordingly. This can include initiating movement within mechanical machines or adjusting operational parameters to maintain optimal performance.

Controllers

Controllers adeptly manage the flow of data, not merely relaying information but also processing it to execute complex logic functions, control motion, and oversee robotics. Furthermore, advanced controllers possess the capability to seamlessly integrate with various industrial communication networks, allowing them to interact and share data with other machines and management systems, effectively enhancing productivity and system monitoring. Automation technology primarily utilizes Programmable Logic Controllers (PLC) and Distributed Control Systems (DCS).

Industrial communication

Industrial communication networks ensure that all parts of an automation system can work together effectively. Industrial communication protocols enable high-speed communication between different devices and software systems, which is essential for process control and automation. These protocols are divided into the families of classic fieldbuses, the first of which were developed in the 1980s, and industrial Ethernet, which has been in use since the early 2000s. In the course of the fourth industrial revolution, i.e. the networking of industrial systems with IT resources, the protocol families mentioned are also increasingly being supplemented by IoT technologies.

In modern manufacturing, automation systems play a central role in optimising efficiency and reducing dependence on manual intervention. These systems can be divided into four main categories in terms of their variability:

Fixed automation

Fixed automation represents a type of automation technology where the sequence of processing operations is fixed by the equipment configuration, meaning the sequence of operations is pre-programmed and does not easily allow for changes or variations. This form of automation technology is engineered to produce a single product, or a very limited range of products, with high efficiency over long production run.

Programmable automation

Programmable automation represents a sophisticated automation technology that enables the production of goods in batch quantities, which can range from several dozen to several thousand units at a time. This form of automation technology is particularly advantageous when there is a need for producing different product configurations, as it allows for the reprogramming and reconfiguration of production equipment to accommodate new batches. Programmable automation technology includes Computer Numerical Controlled (CNC) machines and industrial robots.

Flexible or Agile Automation

This type of automation technology delivers the ability to quickly change over to different product types with minimal downtime for setup changes, offering a high degree of flexibility. It's especially suitable for environments with a varied product mix or where customization is frequent. Flexible automation technology typically involves programmable equipment like robotic arms capable of multiple tasks, including assembly, welding, and painting.

Integrated Automation

Represents a sophisticated synergy of various automated technologies and systems designed to operate with minimal human intervention. At its core, integrated automation technology systems involve the complete automation of manufacturing plants, where computers and machines collaborate seamlessly to design parts, test completed designs, fabricate new parts, and manage the entire production process. This approach is applicable to both continuous process manufacturing and batch process manufacturing, ensuring efficiency and consistency across operations. The technology underpinning integrated automation includes Computer-Integrated Manufacturing (CIM), which encompasses computer-aided engineering, enterprise management systems, robots, and automated integrations. CIM allows for the entire manufacturing process to be run by automated systems, from prototyping to robotic production lines, quality control, storage, data management, and distribution. Moreover, the Industrial Internet of Things (IIoT) plays a crucial role by enabling devices and smart machines to connect through sensors and artificial intelligence (AI), facilitating real-time data sharing and process optimization.

At its core, industrial automation technology embodies a paradigm shift, steering away from manual involvement towards the strategic deployment of cutting-edge control systems and seamless industrial communication technologies. This strategic evolution is meticulously crafted to elevate the speed, quality, and adaptability of production processes. Embracing a holistic methodology, diverse technologies and devices seamlessly converge, orchestrating a symphony of collaboration through a spectrum of communication protocols. The ultimate outcome is a unified endeavor, meticulously designed to amplify efficiency and fortify reliability within the ever-evolving landscape of the industrial 4.0 sector.

Automation technology has been a transformative force in modern industry, streamlining processes and enhancing productivity with remarkable efficiency. At its core, automation involves the application of technology to perform tasks with minimal human intervention, ensuring that processes are carried out efficiently and consistently. The journey of industrial revolutions commenced in the late 18th century, ushering in transformative shifts across technological, socioeconomic, and cultural landscapes. The First Industrial Revolution, initiated around 1765, marked a pivotal transition from manual to mechanized production, fuelled by steam, water and power, with coal as the primary energy source. Mechanization profoundly reshaped the agricultural economy, giving rise to mass coal extraction and the revolutionary steam engine. Nearly a century later, the Second Industrial Revolution emerged in 1870, propelled by new energy sources - electricity, gas, and oil. This era introduced the internal combustion engine, advancements in steel production, and breakthroughs in communication technologies like the telegraph and telephone. Iconic inventions such as the automobile and airplane became enduring societal pillars. The Third Industrial Revolution unfolded in 1969, intertwining electronics, telecommunications, and computers with society. This period harnessed nuclear energy as a power source and propelled advancements in space exploration, research, and biotechnology. Innovations like Programmable Logic Controllers (PLCs) and robots elevated automation across diverse industries. In the 21st century, the Fourth Industrial Revolution, or Industry 4.0, takes centre stage, characterized by the fusion of the digital, physical, and biological realms. Propelled by cyber-physical systems, the Internet of Things (IoT), cloud computing, cognitive computing, and artificial intelligence, this revolution transcends smart and connected systems, exploring the vast potential of technology to enhance both virtual and physical realities. Navigating through the Fourth Industrial Revolution reveals a fundamental shift in how we live, work, and relate, similar to its predecessors.

Representing a new chapter in human development, it unfolds with extraordinary technological advances comparable to those witnessed in the preceding industrial revolutions. In parallel with these technological advancements, the implementation of robust industrial communication protocols remains a critical aspect in automation technology, as they provide the necessary infrastructure for data exchange and control over machinery and plants, which is the cornerstone of successful automation. These protocols, primarily under the domain of Industrial Ethernet and Fieldbus are instrumental in creating an interconnected industrial environment where various components can communicate and operate harmoniously.

Industrial Ethernet, for instance, employs protocols that deliver determinism and real-time control, essential for maintaining the precision required in industrial setting, while Fieldbus is a bidirectional communication protocol that provides real-time, closed-loop control between intelligent field instruments and host systems. It allows for the interconnection of devices such as sensors and actuators on a network without the need for each device to be connected back to a controller. This system is particularly beneficial in industrial settings where numerous input and output devices require efficient communication. Protocols such as EtherCAT, Ethernet/IP, PROFINET, SERCOS III, CC-LINK IE and Modbus TCP are examples of the diverse range of protocols under the umbrella of Industrial Ethernet. While DeviceNet, Modbus, PROFIBUS and FOUNDATION Fieldbus are notable examples of fieldbus networks.

In summary, automation technology represents a significant leap forward in the ability to perform complex tasks with precision and reliability. The role of industrial communication underscores the critical need for robust and standardized protocols to manage the intricate dance of automated technology within the industrial sector.

In today's rapidly evolving industrial 4.0 landscape, the integration of robust industrial communication systems stands as a cornerstone for unlocking unparalleled advantages in automation. From optimizing operational efficiency to fostering real-time control, the merits of embracing industrial communication are transformative, such as:

Real-time monitoring

Real-time monitoring and control within industrial automation technologies are significantly enhanced by the advent of industrial communication protocols These protocols are designed to ensure connectivity between machines, devices, and systems within an industrial network, enabling greater visibility and control over operations. Real-time data exchange is essential in manufacturing operations as it allows for faster and better decisions, improved productivity and quality, reduced costs and risks, and enhanced customer satisfaction. The adoption of these technologies enables the collection of large volumes of data and the application of advanced analytical algorithms to obtain valuable real-time insights. In highly interconnected environments, efficiency and quality heavily rely on data acquisition and the implementation of predictive models, making these technologies essential components.

Data accuracy

Data accuracy is crucial in manufacturing, and automation technologies enhances this by eliminating human error, thus reducing the risk of defects and inconsistencies in the finished product. Automation technology integrates sensors into equipment and machinery to collect data on various parameters, ensuring enhanced accuracy through real-time monitoring and feedback. The use of standardized industrial communication protocols ensures that data can be exchanged seamlessly between different devices and systems, allowing automation technologies to operate at peak efficiency. This standardization reduces the risk of errors that could occur when integrating equipment from various vendors, thereby improving the overall quality, consistency and availability of the manufacturing process. Moreover, industrial communication protocols enable precise data collection and analysis in real-time, which is critical for tasks such as demand response automation and forecasting optimization. This real-time data exchange and coordination of tasks between different network elements are the essence of process control and automation technology in general.

Fault detection and maintenance

Fault detection and maintenance are also improved by industrial communication in automation. These protocols, which are sets of rules for data exchange among network devices and software systems, ensure reliable and real-time control over industrial processes. They are designed to interconnect systems, interfaces, and instruments that make up an industrial control system. The use of secure industrial communication protocols is vital as they enable greater visibility and control over operations for managers. This enhanced oversight is particularly important for fault detection, as it allows for the monitoring of machine performance and the early identification of any irregularities or deviations from standard operation. This proactive approach to fault detection prevents breakdowns before they occur. Furthermore, protocols like MQTT (Message Queuing Telemetry Transport) are designed for remote locations with high-latency, low-bandwidth, and unreliable networks, making them suitable for IIoT systems where fault detection and response times are critical: So they enable predictive maintenance.

Scalability and flexibility

Scalability and flexibility are essential features of an effective industrial automation technology. Scalable automation can change in size to suit requirements and limitations, while flexible automation exhibits the capability of making different products in a short time frame. These features allow businesses to grow and respond to market demands without major modifications or redesigns. The ability to connect various components like PLCs, machine controls, HMIs, sensors, and systems is vital for overcoming data silos that can hinder automation processes. Industrial communication protocols ensure effective equipment communication, driving automation and enabling scalable adjustments in response to production demands, minimizing downtime. These protocols offer flexibility through the integration of standards like Modbus and newer Ethernet-based protocols like EtherCAT, providing manufacturers with diverse options. This adaptability allows for the seamless integration of new automation technologies into existing systems, facilitating upgrades and expansions without requiring complete overhauls.

Interoperability and standardization

Interoperability takes centre stage, enabling the dynamic exchange of real-time data across different systems. This ensures direct communication and accurate data interpretation while preserving its original context—a fundamental capability crucial not only for the optimal functioning of various automation technologies. Complementing this, standardization provides a structured framework of specifications, guidelines, and protocols, serving as the bedrock for interoperability. It guarantees that products, processes, or services in the industry 4.0 adhere to consistent quality and safety benchmarks, vital for the compatibility and functionality of automation technology systems. Industrial communication protocols play a pivotal role in achieving interoperability and standardization among various devices and systems within smart factories. One of the key aspects of these industrial communication protocols is their adherence to the ISO/OSI model, which defines the layers that make up the stack of a network, ensuring that each layer addresses a specific communication problem. This structured approach allows for the efficient handling of data packets and provides a standardized framework for communication.

As industries continue to evolve towards smarter, interconnected systems, within the domain of industry 4.0 the role of industrial communication becomes increasingly crucial. It not only ensures the efficient exchange of data but also empowers industries to embrace innovation, enhance reliability, and stay at the forefront of technological advancements. In the ever-evolving landscape of automation technology, effective industrial communication protocols remain a cornerstone for achieving operational excellence and driving sustained success.

The significance of industrial communication lies in its ability to ensure reliable data transmission from the field to the control level, which is essential for maintaining the availability and security of networked systems. Quality communication equipment is vital for employers and employees to stay aligned, enabling tasks to be explained more thoroughly and executed correctly. Moreover, secure industrial communication protocols are indispensable for managers to have greater visibility and control over their operations, helping to overcome data silos and drive industrial automation. This form of communication encompasses various industrial communication protocols, divided in the three families Fieldbus, Industrial Ethernet and IoT-Technologies, the most important of which are briefly and incomplete outlined below:

Field buses

Fieldbus protocols are fully digital, serialised, bi-directional communication systems that connect various measurement and control devices, including sensors, actuators and controllers. These systems provide a standardised method for process control to move from centralised to distributed architectures, so that control functions can be housed directly in field devices such as transmitters, valves and analysers. There are a few well-known fieldbus protocols, such as:

PROFIBUS

PROFIBUS ensures reliable data transmission across industrial settings. This protocol, managing message design, network access, and fault control, is orchestrated by ASICs (Application-Specific Integrated Circuits). PROFIBUS enables cyclic data exchange between PLCs and field-devices, a fundamental aspect allowing both cyclical and acyclical communication.

PROFIBUS DP excels in fast, high-performance data transmission, boasting speeds up to 12 Mbps and supporting up to 126 devices per segment. Primarily used in production automation, it facilitates the centralized control of sensors and actuators. The communication hierarchy involves the PROFIBUS-DP controller overseeing the exchange with device field sensors, each device's address configured at the setup.

Contrastingly, PROFIBUS PA is tailored for process automation, especially in monitoring measuring equipment via a process control system. Purpose-built for potentially explosive areas (Ex-zone 0 and 1), PROFIBUS PA utilizes twisted shielded wire pairs for both power and communication. Evolving from HART communication, it addresses the crucial communication needs between measuring instruments and the control system in field applications.

Modbus

Modbus over Serial Line is a controller-device model that allows one controller and multiple devices to communicate over a serial bus. This protocol is particularly significant because it facilitates communication between PLCs, sensors, and other equipment, thereby enabling an integrated and efficient system operation. Modbus specifies data addresses corresponding to four tables in each client device, with the Input Registers and Holding Registers being particularly noteworthy. It supports a range of commands to read and write data using a 16-bit 0-based number, providing an address range of 0-65535.

FOUNDATION Fieldbus

Allows multiple devices to be connected in parallel along the same pair of wires, which not only simplifies the network architecture but also reduces the need for extensive wiring typically found in traditional point-to-point systems. Each device on the network is uniquely identified by its address, enabling efficient communication across the system.

DeviceNet

A digital, multi-drop network that connects and serves as a communication network between industrial controllers and I/O devices. It utilizes the Common Industrial Protocol over a Controller Area Network media layer and defines an application layer to cover a range of device profiles.

Industrial Ethernet

Since the development of the standard Ethernet, its use in automation has been considered very tempting, as TCP/IP-based technology would enable communication across all levels of the automation pyramid. For a long time, however, the lack of real-time capability, which is essential for industrial applications, was the reason why fieldbuses continued to be used. However, the developments and potential towards a fully networked Industry 4.0 led to the organizations behind the common fieldbus protocols also developing dedicated Industrial Ethernet protocols. These add real-time capability to standard Ethernet and thus enable more efficient automation. The most important real-time Ethernet protocols are:

Ethernet/IP

A prominent network protocol that adapts the Common Industrial Protocol (CIP) to standard Ethernet, facilitating communication among industrial devices. The protocol is widely recognized for its ability to enable devices to communicate over a standard Ethernet network, which is integral to industrial automation technology. It operates on an active infrastructure, employing point-to-point connections in a star topology with the interconnection of layer-2 and layer-3 switches at its core. This configuration allows for the support of numerous point-to-point nodes, making it a robust solution for industrial automation networks. The protocol's design principles include decentralization, collision detection, retransmission, and simplicity, which are foundational to Ethernet as a family of computer networking technologies used across local, metropolitan, and wide area networks.

EtherCAT

This protocol is standardized in IEC 61158 and is suitable for both hard and soft real-time requirements in automation technology, test and measurement, and many other applications. EtherCAT employs a controller/device model, where the controller device sends commands to and receives data from device devices. Utilizing "on-the-fly" processing, a single frame is sent to all nodes, traveling around the network, and passing through each node before returning to the controller. This unique processing method enables extremely high bandwidth utilization, making EtherCAT ideal for hard real-time requirements crucial in applications like robotic systems. EtherCAT's versatility is highlighted by its support for various topologies (line, tree, star, or daisy-chain) without limitations from cascading switches or hubs. Enhanced by EtherCAT P, it enables data and power transmission via a single cable, providing benefits for diverse applications. In terms of synchronization, EtherCAT's distributed clocks feature ensures high-precision synchronization across nodes, vital for coordinated movements in multi-axis motion control applications. The hardware-based clock calibration guarantees synchronicity with a system jitter of less than 1μs.

PROFINET

PROFINET operates on the principle of cyclic data exchange, where an IO-Controller acts as the producer and multiple IO-Devices function as consumers of output data, and vice versa. This exchange is pivotal for real-time communication in industry 4.0, ensuring that data is transmitted reliably and efficiently between controllers and devices which makes up the entire automation technology system. The protocol's functionality extends to supporting various network topologies and providing comprehensive device configuration and diagnostics.

POWERLINK

A sophisticated communication protocol that operates over standard Ethernet infrastructure, enhancing it with a specialized mixed polling and time slicing mechanism. This advanced system ensures the reliable transfer of time-critical data within extremely short and precise isochronic cycles. Users can configure these cycles to meet specific response time requirements, thereby tailoring the network's performance to the demands of various industrial automation applications. The protocol's ability to synchronize all nodes in the network with sub-microsecond precision is one of its most critical features. This high level of time synchronization is essential for applications that require coordinated timing across multiple devices, such as synchronized motion control in manufacturing processes or precise data acquisition in testing and measurement scenarios.

SERCOS III

SERCOS III (Serial Real-time Communication System) is the third generation of the SERCOS interface, which is an Ethernet-based real-time communication system for industrial automation solutions. It supports up to 511 devices controlled by one controller, with both controller and device devices having two real-time Ethernet ports The protocol ensures hard real-time characteristics through synchronization marks issued by the controller control at exact equidistant time intervals, allowing for cyclical and simultaneous synchronization of all connected devices.

CC-Link IE

is a high-speed field network capable of handling both control and information data simultaneously. It boasts a high communication speed of 1 Gbps, can connect to 120 stations, and achieve a maximum transmission distance of 100 meters between station without requiring a gateway for communications with personal computers and other information devices.

Modbus TCP

Leverages the robustness and reliability of TCP/IP networks by encapsulating Modbus messages within TCP/IP packets. This allows for efficient and reliable data transfer over Ethernet, which is ubiquitous in modern interconnected environments. The protocol's design combines the physical network infrastructure of Ethernet with the networking standard of TCP/IP, while retaining the standard method of representing data through the Modbus application protocol.

IIoT-Technologies

The fieldbus and industrial Ethernet protocols have taken automation to a whole new level and signalled enormous progress, but both technologies have a decisive disadvantage: the variety of protocols and their lack of interoperability. As there are one or more automation manufacturers behind each protocol, each competing for supremacy in the automation market, they cannot easily communicate with each other. To make this possible, gateways, switches or multi-protocol-capable communication interfaces are required, for example. However, complete networking in the sense of IIoT and Industry 4.0 requires maximum interoperability in order to enable a high degree of efficiency. Two technologies in particular are currently becoming state-of-the-art:

MQTT

Message Queuing Telemetry Transport is a lightweight, publish-subscribe network protocol designed to facilitate communication in environments with limited resources and unreliable networks. Originating in 1999, MQTT was initially developed for the oil and gas industry to enable remote monitoring equipment to transmit data efficiently over satellite connections, which were expensive and charged based on data usage. This protocol is particularly suitable for machine-to-machine (M2M) communication and Internet of Things (IoT) applications, where it enables devices such as sensors, actuators, and home appliances to connect and exchange data with minimal bandwidth and power consumption.

MQTT operates on top of the TCP/IP protocol, ensuring reliable message delivery through a broker-centric model. In this model, clients can either publish information to a topic or subscribe to receive updates from a topic, without direct interaction between the publisher and subscriber. The protocol supports multiple levels of Quality of Service (QoS) to guarantee message delivery according to the needs of the application, ranging from "at most once" to "exactly once" delivery. Its efficiency is further enhanced by a small packet size, including a minimal two-byte header, which makes it ideal for scenarios with stringent bandwidth constraints.

Moreover, MQTT's design emphasizes security and scalability, making it a robust solution for a wide range of IoT applications, from smart homes to industrial automation. Its lightweight nature does not only reduce network traffic but also conserves battery life in portable IoT devices, addressing two critical challenges in IoT ecosystems. Given its advantages, MQTT has been widely adopted across various industries, demonstrating its versatility and effectiveness in enabling efficient, reliable IoT communications.

OPC UA

Open Platform Communications Unified Architecture is a machine-to-machine communication protocol for industrial automation, developed by the OPC Foundation. It represents a significant evolution from its predecessor, offering platform-independent, service-oriented architecture that integrates various OPC Classic specifications into an extensible framework. This advancement enables it to function across different operating systems and networks, making it truly platform-independent.

The significance of OPC UA in the industrial sector cannot be overstated. It facilitates secure, reliable, and standardized data exchange between multi-vendor devices and control applications without proprietary restrictions. This interoperability is crucial for Industry 4.0 and the Internet of Things (IoT), as it allows for seamless integration and communication between diverse equipment and systems within industrial environments. Moreover, OPC UA's design includes robust security features such as end-to-end encryption, certificate-based authentication, and digital signature mechanisms, ensuring the integrity and privacy of data shared between devices.

In practical terms, OPC UA supports real-time monitoring, secure data exchange, scalability, flexibility, diagnostics, and historical data access, enhancing efficiency, productivity, safety, and enabling informed decision-making in factories, warehouses, processing, and manufacturing plants. Its adoption is further driven by the need for open communication with field devices, exemplified by products like Omron's NX102 Machine Controller, which embeds OPC UA server functionality to meet SCADA software communication needs.

Looking ahead, the future of OPC UA appears promising, with increasing demand for its support on the shop floor and expanding benefits through advancements like the OPC UA Field eXchange (UA FX) specifications and technologies such as Single Pair Ethernet (SPE) and Time-Sensitive Networking (TSN). These developments are set to enhance real-time management and device synchronization, facilitating faster and more efficient integration of edge devices into industrial systems.

As organizations increasingly embrace automation technology, it has revolutionized operations and unlocked a plethora of advantages across various facets of business, such as:

1. Increased Production and Productivity: Automation technology leads to higher production rates and increased productivity, allowing for more efficient operations.
2. Quality Improvement: Automation technology provides result in better product quality due to the precision and consistency of machines.
3. Safety Enhancement: Automation technology improves safety by taking over dangerous tasks from human workers, reducing the risk of accidents.
4. Efficiency in Material Use: There is a more efficient use of materials as automation technology minimizes waste through precise control.
5. Shorter Lead Times: Automation technology can reduce factory lead times, enabling faster delivery of products to the market.