By Todd Gurela, Senior Director, Manufacturing Industry Solutions Group, Cisco
Industrie 4.0, or the Industrial Internet of Things (IIoT), offers great promise for manufacturers looking to optimise business operations. By bringing together the machines, processes, people and data on your plant floor through a secure Ethernet network, the IIoT makes it possible to design, develop, and fabricate products faster, safer, and with less waste.
For example, one automotive parts supplier eliminated network downtime – saving $1M in the process – simply by deploying a new wireless network across the factory floor. The time it took for the company to completely recoup their investment in the project? Just nine months.
The key to any successful Industrie 4.0 project is factory data. Without data, extracted from multiple sources and delivered to the right application, at the right time – little optimization can happen. And there is a multitude of meaningful data held in factory equipment. Consider how real-time access to condition, performance, and quality data – across every machine on the floor – would help you make better business and production decisions.
Imagine the following. A machine sensor detects that volume is low for a particular part on your assembly line. Data analysis determines, based on real-time production speed and previous output totals, that the part needs to be re-stocked in one hour. With this information, your team can arrange for replacement parts to arrive before you run out, and avoid a production stoppage.
This scenario may be a theoretical, but it illustrates a genuine truth. Manufacturers need reliable, scalable, secure factory networks so they can focus on their most important task: making whatever they make more efficiently, at higher quality levels, and at lower costs.
At the heart of this truth is the factory network. So while the key to a successful Industrie 4.0 project is data, the key to meaningful, accurate data is the network. And manufacturers need to plan carefully to ensure their network can deliver on their needs.
Five Key Network Characteristics
There are five characteristics manufacturers should look for in a factory network before selecting a vendor. In no particular order, they are:
- Interoperability. This ability allows for the ‘flattening’ of the industrial network to improve data sharing, and usually includes Ethernet as a standard.
- Automation. For ‘plug and play’ network deployment to streamline processes and drive productivity.
- Simplicity. The network infrastructure should be simple, as should the management.
- Security. Your network should be secure and provide visibility and control into your data to reduce risk, protect Intellectual Property, and ensure production integrity.
- Intelligence: You need a network that makes it possible to analyze data – and take action – quickly, even at the network edge.
Manufacturers need solutions with these features to help aggregate, visualize, and analyze data from connected machines and equipment, and to assure the reliable, rapid, and secure delivery of data. Anything less will leave them wanting, and with sub-par results.
Network interoperability allows manufacturers to seamlessly pull data from anywhere in their facility. An emerging standard in this area is Time Sensitive Networking (TSN). Although not yet widely adopted, TSN provides a common communications pathway for your machines. With TSN, the future of industrial networks will be a single, open Ethernet network across the factory floor that enables manufacturers to access data with ease and efficiency.
Most important, TSN opens up critical control applications such as robot control, drive control, and vision systems to the Industrial Internet of Things (IIoT) – making it possible for manufacturers to identify areas for optimization and cost reduction. Also, with the OPC-UA protocol now running over TSN, it also becomes possible to have a standard and secure communication from sensor to cloud. In fact, TSN fills an important gap in standard networking by protecting critical traffic.
How so? Automation and Control applications require consistent delivery of data from sensors, to controllers, and actuators. TSN ensures that critical traffic flows promptly, securing bandwidth and time in the network infrastructure for critical applications while supporting all other forms of traffic. And because TSN is delivered over standard Industrial Ethernet, control networks can take advantage of the security built into the technology.
Time Sensitive Networking eliminates network silos that block reachability to critical plant areas, so that you can extract real-time data for analytics and business insights. This is key to the future of factory networks, as TSN will drive the interoperability required for manufacturers to maximise the value from Industrie 4.0 projects.
One leading manufacturer estimated that unscheduled downtime cost them more than $20,000/minute in lost profits and productivity. That’s $1.2M (USD) per hour if production stops. Could your organisation survive a stoppage like that?
Network automation is critical for manufacturers who have growing network demands. This includes needing to add new machines, or integrate operational controls, to existing infrastructure as well as net-new deployments. Network uptime becomes increasingly important as the network expands.
Ask yourself whether your network and its supporting tools, have the capability for ‘plug and play’ network deployments that greatly reduce downtime if – and when – failure occurs. It’s essential that factories leverage networks that automate certain tasks – to automatically set correct switch settings, for example – to meet Industrie 4.0 objectives. The task is too overwhelming otherwise.
Like automation, network simplicity is an essential component of the factory network. Choosing a single network infrastructure, capable of handling TSN, Ethernet IP, Profinet, and CCLink traffic can significantly simplify installation, reduce maintenance expense, and reduce downtime.
It also makes it possible to get all of your machine controls, from any of the top worldwide automation vendors, to talk through the same network hardware.
Consider also that you want a network that can be managed by operations and IT professionals. Avoid solutions that are too IT-centric and look for user-friendly tools that operations can use to troubleshoot network issues quickly. Tools that visualize the network topology for operations professionals can be especially useful in this regard.
For example, knowing which PLC (including firmware data) is connected to which port, and which I/O is connected to the same switch, can help speed commissioning and troubleshooting. Last, validated network designs are essential to factory success. These designs help manufacturers quickly roll out new network deployments and maintain the performance of automation equipment. Make sure this is part of the service your network vendor can provide.
Cybersecurity is critically important on the factory floor. As manufacturing networks grow, so does the attack surface, or vectors, for malicious activity such as a ransomware attack. According to the Cisco 2017 Midyear Cybersecurity Report, nearly 50% of manufacturers use six or more security vendors in their facilities. This mix-and-match of security products and vendors can be difficult to manage for even the most seasoned security expert.
No single product, technology or methodology can fully secure industrial operations. However, there are vendors that can provide comprehensive network security solutions which include simple protections for physical assets, such as blocking access to ports in unmanaged switches or using managed switches, in their plant network infrastructure.
Protecting critical manufacturing assets requires a holistic defense-in-depth security approach that uses multiple layers of defense to address different types of threats. It also requires a network design that leverages industrial security best practices such as Demilitarized Zones (DMZs) to provide pervasive security across the entire plant.
Consider for a moment how professional athletes react to their surroundings. They interpret what is happening in real-time, and make split-second decisions based on what is going on around them. Part of what makes those decisions possible is how the players have been coached to react in certain situations. If players needed to ask their coach for advice before taking every shot, calling every audible, or turning every double play…well, the team wouldn’t be very good.
Just like a team’s performance improves when players can take in their surroundings and perform an appropriate action, the factory performs better when certain network data can be processed and actioned upon immediately – without needing to travel to the data centre first. Processing data in this way is called edge, or fog, computing. It entails running applications right on your network hardware to make more intelligent, faster decisions.
Manufacturers need to access information quickly, filter it in real-time, then use that data to better understand processes and areas for improvement. Processing data at the edge is key to unlocking networking intelligence, so it’s important to ask yourself whether your factory network can support edge applications before beginning a project. And if it cannot, it’s time to consider a new network.
A final note on network intelligence. Once you deploy edge applications, make sure you have the tools to manage and implement them with confidence, at scale. Managing massive amounts of data can quickly become a problem, so you’ll need systems that can extract, compute, and move data to the right places at the right time.
The opportunity for manufacturers who invest in Industrie 4.0 solutions is massive (and it’s time that leaders from the top floor and shop floor realized it). But before any Industrie 4.0 project can get off the ground, the right foundation needs to be in place. The factory, or industrial, network is that foundation…and manufacturers owe it to themselves to select the best one available.
Todd Gurela is senior director of Cisco’s Manufacturing Industry Solutions Group and a global thought leader on digital manufacturing. He is responsible for Cisco’s IoT products, services, and solutions strategy and development.