Redundancy protocols PRP and HSR guarantee switchover times of 0 seconds, and RSTP, MRP and Fast MRP are also supported. Now it is possible to deploy a fail-safe Hirschmann WLAN network with the reliability of a Hirschmann Ethernet network.
Industrial Ethernet needs to be built to last and it needs to be certified that it will. It must be designed to last in areas of increased shock and vibration, electromechanical noise, pressure, and element intrusion such as extreme temperature, water, sand and debris. An application engineer or plant manager must be vigilant when selecting a supplier for their industrial network to make sure that switches, routers and wireless equipment were designed and have the necessary certifications (e.g., UL, IEC, ATEX, NEMA) for their network environment.
Oil and Gas operations are mission critical. Network downtime can be extremely costly and dangerous. Integrated security and media redundancy are crucial. Security threats generally consist of attacks against assets and can be caused by unintentional faulty operation of the systems. Cyber data security is a vital element of managing reliable auxiliary networks across the platform or plant operation. Belden provides state-of-the-art security for process automation networks and offers a full range of unique products and solutions, such as the EagleTofino and new HiLCOS Hirschmann™ platform that insures secure and reliable communication across all plant operations.
Fiber optic cabling based process bus is the first step to reduce the amount of copper wiring in the expanding plant network. Instead of several kilometers of copper, you would be installing few hundred meters of fiber. In the event of an electromagnetic surge, fiber guarantees 100% of your the communication network infrastructure will remains available. Furthermore, fiber decreases latency and better supports the high bandwidth demands of your growing auxiliary and surveillance networks. Cost savings with bidirectional fiber decrease latency and costs of commissioning expansive networks.
Hirschmann and Belden Cable have products that are designed to meet the demanding environmental conditions and regulatory demands of the Oil and Gas industry, from UL Explosion-Proof to various maritime certifications.
Oil and Gas networks have always been mission-critical in nature. Hirschman products are leading the charge in fortifying these critical networks with cutting-edge industrial firewalls and embedded security technologies throughout their switch line to insure that your network is safe, secure and always available.
Customers can rely on our ability to support, deliver and maintain our products anywhere in the world. Our Competence Center and a strong System Integrator platform plan, are capable of designing and installing complete communication networks or upgrade complex auxiliary network assets for our customers.
“Made in Germany” stands for a three phase quality ensuring process. This begins with a strong R&D process using an integrated approach such as the V-Model, followed by intensive product qualification programs and final 100% production testing before shipment to the customer. All Belden processes are designed and implemented to go well beyond the industry-independent ISO 9001:2008 standard. For example, Hirschmann™ exceeds IRIS standard requirements whilst holding IRIS V 0.2 certification. connect to following
To enable us to deliver constant innovation in areas such as embedding Ethernet interfaces into IEDs, requires us to play a leading role in specifying and implementing new redundancy protocols, such as PRP / HSR, and to be a pioneer of time synchronization technologies. Belden Industrial IT is also defining new security methods to protect the entire automation system down to the IO level and into alternative networks like WLAN. Hirschmann is bringing Oil and Gas customers network and control options that were once deemed too complex and too insecure.
Network failures within Industrial networks represent potentially dramatic fiscal loss and can pose extreme danger. For example; a crude-oil pump station halted for an hour may cost the operating firm thousands, or even millions, of lost production dollars. Data flow needs to be guaranteed to enable electricity to flow from command and control to all assets within the field. The IEC-standard redundancy protocols (PRP, HSR) can guarantee for the first time uninterrupted communication in power systems in even the harshest of environments.
Copper is expensive to deploy over large area networks is high in latency. As offshore and onshore gas networks modernize and shift to more efficient Ethernet based networks, fiber begins to make more sense from a cost and functional perspective. As earlier mentioned, latency is lower with Fiber. Additionally, a fiber network is less static than copper, allowing for operations to modernize and expand their operational network according to need in the future. Belden is meeting this industry head-on with comprehensive fiber offerings and that will support offshore networking needs for years to come.
As offshore operations grow more efficient and smarter, so must the process in which they are controlled an managed. DCS and Auxiliary networks are gradually becoming seamlessly integrated in function and control. HMI and central control stations need to have constant access to the every aspect of the network at all time. With the Hirschmann industrial backbone, we are able to support enterprise-level communication and control with the dependability that industrial grade Ethernet.
Platforms, by design, are remote networks and most users of Industrial Ethernet are not IT professionals. This is why Hirschmann has designed their products to be installation-ready and easy to monitor with supporting network management software like Industrial HiVision. Outside of being incredibly robust and reliable, you can count on Belden to provide a user-friendly solution ideal for the remote mission critical networks like offshore.
The Media Redundancy Protocol, MRP, was designed to address the needs of industrial applications. This protocol is described in Standard IEC 62439, the industry standard for high availability networks. MRP is exclusively defined for ring networks, however, it guarantees deterministic fault recover time behavior.
Depending on the set of parameters used, the recovery time in a failure situation can be guaranteed to be less than 500ms, 200ms or even 10ms. Configuration of a MRP ring is very simple, only a redundancy manager has to be defined.
RSTP, the Rapid Spanning Tree Protocol is an optimised Version of STP and is defined by IEEE 802.1D. RSTP implementation works with different kinds of topologies, e.g. rings or meshed networks, even in very large networks. However RSTP does not guarantee deterministic recovery time behavior. The recovery times depend on where in the network the failure happens and on the individual implementation.
Because of this there are several attempts to optimize RSTP by limiting the use to ring topologies and the use of predefined parameters. Based on these optimizations it is possible today to demonstrate fault recovery times the size of 100 milliseconds or even below. The configuration effort for RSTP is medium due to the different options such as root switch, priority, etc.
MRP: 50+. Switches based on ring topology. Recovery time is almost independent of the number of switches in the ring
RSTP: up to 40 Switches for any type of topology. Because RSTP works in a hop-by-hop principle, recovery time will almost linearly increase with the number of switches in the ring.
There is no best or worst case recovery time for HSR, since there is no recovery time at all. The network recovery time from no fault to a single fault in a ring will always be zero. Also, the repair operation from one fault to no fault is also with zero switchover time.
HSR, as MRP or RSTP in ring configuration, can only sustain one fault in the ring network. This is due to the physical topology, not due to the redundancy protocol. Rings that are coupled via Quad Boxes do not share the same redundancy domain. Therefore, each individual ring can sustain a single fault.
Both HSR and PRP are specified in the International Standard IEC 62439-3. HSR and PRP are therefore standardized and not proprietary technologies.
While HSR and PRP are superior to MRP or RSTP in terms of reconfiguration performance, there are also drawbacks to the technology:
Where seamless redundancy is not explicitly needed, the use of MRP (with SubRings) or RSTP technology may be more cost-effective than HSR/PRP. But where the application requirements justify the additional costs, PRP/HSR can be utilized.
There are several answers to this question. It is true that the technology is standardized, but there are several key factors why a customer should buy a Hirschmann HSR/PRP device:
HSR and PRP were conceived for use in IEC 61850 substation automation, where network reconfiguration times cannot be tolerated, especially on the process bus with sampled values traffic. However, PRP/HSR can also be used in factory automation, especially as redundancy solutions for motion control applications.
In short, PRP/HSR can be used anywhere when only very low to zero network recovery times can be tolerated. This is especially true in time synchronized networks, e.g. with IEEE 1588v2. HSR in particular with its ring structure and cut-through switching, can also provide very low end-to-end latency on ring networks.
The total number of HSR devices in one ring should be limited to 50. This is mainly to reduce the latency in the ring. For very time-critical applications it may be necessary to limit the number of devices even to a smaller number. Another limitation for the number of devices in a ring can be the size of the duplicate detection table inside the device. This is dependent on the implementation.
The IEC standard (IEC 62439-3) for HSR and PRP is now stable and the feasibility of the technology has been shown. HSR and PRP are highly future-proof thanks to the direct integration into the IEC 61850 standard and the acceptance of all major energy automation companies. HSR/PRP technology is expected to be successful in other application fields as well, in particular factory automation. The technology is scalable in line speed (Gigabit speed is scheduled as future improvement to the standard) and can be flexibly adapted to incorporate other technologies, e.g. 1588v2 time synchronization.