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The Future of Safe Automation

Thomas Pilz is managing partner of Pilz GmbH & Co., a provider of safe automation technology.

Safety in future production environments must be checked and enabled in real-time, so that the protection of humans and machines is guaranteed.

The standards and laws for safety in an industrial environment are currently facing upheaval. This is being driven by the issues of security and artificial intelligence (AI). For industry in general, there are three new or upcoming legal requirements for security that are relevant: EU Directive NIS 2, the Cyber Resilience Act, and the new Machinery Regulation.

NIS 2: More Obligations and More Sanctions for More Companies

NIS (Network and Information Security) is a European Union Directive aimed at strengthening cybersecurity. This directive has been in existence since 2016 and so far has applied to critical infrastructure providers, including energy, traffic, banks and finance, health, supply and distribution of drinking water, and digital infrastructure. Providers in these sectors have had to implement “appropriate security safeguards” and report any serious cybersecurity incidents.

The successor is NIS 2, which came into force at the beginning of 2023 and must be adopted into national law by EU member states by autumn 2024. The directive also applies within the engineering and automotive sectors, among others, for companies with over 50 employees or an annual turnover of more than 10 million Euro. According to the German Mechanical Engineering Industry Association VDMA, this will affect around 9,000 companies across Europe.

In future these companies will need to prove that they have taken technical, operational and organizational measures to protect against security incidents. First, this will include a risk analysis of existing systems, including in production environments, i.e., OT (operations technology). This will be followed by the development and implementation of specific processes and measures such as password protection or encryption, as well as continuing education and training for employees. Cybersecurity incidents must be reported to the relevant authorities within 24 hours. The explicit inclusion of supply chains is also new.

To summarize, NIS 2 now affects more companies, extends the obligations and provides for stricter sanctions. Companies that fail to take measures are threatened with severe penalties.

Cyber Resilience Act: Security for the Whole Product Lifecycle

In September 2022, the European Commission submitted a draft for a regulation intended to increase the cybersecurity of products. This Cyber Resilience Act is directed toward manufacturers of products with digital elements. This means hardware as well as software (e.g., firmware). The regulation refers to both consumer products as well as products for industrial applications, such as machine controllers.

In accordance with the Cyber Resilience Act, only products that guarantee an appropriate level of cybersecurity may be placed on the market. Manufacturers are also obliged to inform customers of security vulnerabilities and close them as quickly as possible. Thus, the regulation applies to the whole of a product’s lifecycle. This means that manufacturers must now offer software updates beyond the usual warranty period, so that future threats are also repelled.

We assume that the regulation will be adopted at the end of 2024.

The New Machinery Regulation: Mandatory Cybersecurity

The third new statutory security requirement is the EU Machinery Regulation. Its publication is imminent. As it is a regulation, it does not have to be converted into national law first. Machine manufacturers have 42 months in which to meet the new requirements.

The Machinery Regulation replaces the existing Machinery Directive and, in contrast to its predecessor, makes cybersecurity mandatory. If the Machinery Directive purely examined safety, the Regulation includes the security protection goal in the “Essential health and safety requirements EHSR” under “Protection against corruption”: The machine’s safety functions must not be compromised by corruption, whether intentional or unintentional. So far it is known that meeting the requirements of the Cyber Resilience Act leads to presumption of conformity for the Machinery Regulation.

Who Needs to be Concerned with What?

Until now, only energy suppliers were affected by the NIS Directive. With NIS 2, machine builders such as manufacturers of power generation plants (e.g., wind turbines) will also have to meet the requirements in future. In turn, wind turbine manufacturers need automation solutions, controllers or sensors, for example. From a certain size, manufacturers of electrical components also fall under NIS 2. And as NIS 2 also stipulates that suppliers are taken into consideration, a company must also be concerned with safe supply chains and make demands of its suppliers. So, NIS 2 covers the whole supply chain.

In order to import machinery into Europe, machine builders have always had to undergo the conformity assessment procedure, ending with the CE mark. Now, with the new Machinery Regulation, machine builders must prove that their machines are also protected against manipulation. And finally, electrical component manufacturers are subject to the future requirements of the planned Cyber Resilience Act.

To sum up: It is no longer at the company’s discretion whether, and to what extent, it wishes to grapple with security. Now it is a legal requirement. Companies would be wise to deal with NIS 2 as soon as possible and carry out a holistic security assessment for the company. For example, this includes the development of an Information Security Management System (ISMS), with certification in accordance with the information security standard ISO 27001.

Security in the form of industrial security is not solely a task for IT but is an integral part of the design and construction. To implement security retrospectively is always complex, and usually means reductions in user friendliness, functionality and productivity. The risk assessment now also includes security as well as safety. No security, no CE mark!

And for manufacturers of products with digital elements, the IEC 62443 series of standards provides a good orientation. The subordinate standard IEC 62443-4-1, for example, describes the requirements of a “Secure development lifecycle process.”

The EU has been quick off the mark with security legislation; the world’s strictest requirements will apply in Europe. But agreements are already in place with other countries, and such laws will be introduced there too. For example, Australia is currently in talks with the EU and will presumably follow the European standards. So global harmonization of industrial security is to be expected.

Industry has agreed on OPC UA (Open Platform Communications Unified Architecture) for safe, cross-vendor networking for industrial plants. This communication protocol provides a standardized (IEC 62541) interface for communication between different data sources in industry. Safety over OPC UA, a working group that deals with safety, is progressing well with work on functional safety issues. The group is working hand in hand with the inspection authorities on test specification and test systems, as well as certification of communication stacks for OPC UA Safety. Version 1.05 has already been released.

IO-Link Safety

At the sensor level, automation has already taken a great step forward in terms of openness. The communications protocol IO-Link Safety is on the verge of being available commercially. Point-to-point communication offers many benefits, such as simpler installation (e.g., through standardized cabling and the absence of parallel wiring), automated, tool-supported parameterization, and advanced diagnostic options.

We are convinced that future automation solutions will be differentiated even more by their functionalities: how good are the user interfaces, how simple are they to operate, what additional benefits do they offer? There is great innovation strength behind this, resulting in huge potential for new applications.

The Future of Safety is Dynamic

What does further digitization mean for the protection of human and machine? Which technologies meet the safety requirements? What role do humans play? First the good news: The focus is on the human, whose role will even be strengthened.

For example, in the “Fluid Production” project at Arena 2036 that my company is involved with, work is underway to develop and implement a human-centered, cyber-physical production concept, specifically for automotive production. The idea behind the project is to break down production plants into location-flexible modules, so as to form and then disband dynamic units, entirely according to need. The modules are designed with a central focus on the role of the human as an active shaper of their production environment.

From these requirements there is a growing desire for dynamic safety, i.e., the ability to adapt safety functions to changing production processes and the associated protection requirements with greater flexibility. For example, rather than immediately having to come to a hard stop, they allow robots or mobile platforms to continue working at a reduced (and therefore safer) speed when a person enters the workspace or, even better, to incorporate safe evasion strategies. Intelligent sensors and actuators in distributed systems will take over more and more functions from controllers, leading to better interaction between individual machine modules and between human and machine.

With regard to safety, dynamic situations in future production environments must be checked and enabled in real-time, so that the protection of humans and machines is guaranteed at all times. The keyword here is “real-time safety.” In the future it’s conceivable that various machines—or general assets—will share safety devices. When safety is understood in this way, classic CE marking as the result of an analog conformity assessment procedure is ruled out. Information on all the assets involved must be currently available at runtime; keywords here are digital type plate and administration shell.

In the “Fluid Production” project mentioned earlier, we are working on other future topics such as identification (and therefore differentiation) of humans and objects. This lends itself to the use of artificial intelligence. Risks can then be identified and assessed by adaptive AI algorithms—in this case the “analog” CE mark provides basic protection. But additional risk reduction measures can be introduced, which make safety even more flexible and contribute towards greater productivity.

Fecha de publicaciónjulio 15, 2023

BELT.ES no se hace responsable de las opiniones de los artículos reproducidos en nuestra Revista de Prensa, ni hace necesariamente suyas las opiniones y criterios expresados. La difusión de la información reproducida se realiza sin fines comerciales. 

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