The use of the term 'redundancy' in the communications context was primarily introduced by the mathematician and electrical engineer, Claude E. Shannon. It is not the amount of information that is increased, but the probability that the information reaches the recipient. For the industrial network this finding is of fundamental significance.
If a message does not reach a recipient in an office environment, this error can be corrected by sending the message again later. In the industrial environment this same error can have serious consequences. If, for instance, a robot on a production line does not receive the necessary information for several minutes, or even for a few seconds, the entire production line may be affected. In certain circumstances it could mean the line stops.
Hirschmann has developed the Hiper-Ring (for Ethernet networks) based on the concept of the Spanning Tree Protocol. The Hiper-Ring significantly increases the availability of the network and facility, while with Spanning Tree, 30 seconds typically elapse before the failure of a link is compensated, with Hiper-Ring this takes less than half a second. The structure is considerably simplified, as only one additional cable is necessary for Hiper-Ring. Also of interest is the possibility of expansion. A recovery time of a maximum of 500 ms is guaranteed for topologies with up to 50 switches that support the Hiper-Ring concept. The maximum possible distance between two devices is 70 km. Optical ports are available for covering larger distances, which means that the rapid switchover time of 500 ms is made possible for networks covering considerably more than 3000 km.
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Fieldbus & Industrial Networking
RS South Africa is reinforcing its commitment to the country’s dynamic food and beverage sector, backed by a comprehensive portfolio of over 800 000 products, extensive technical expertise and end-to-end service capabilities.
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Fieldbus & Industrial Networking
A large petrochemical refinery asked me to perform an audit on several critical base layer control loops. This article deals with a problem found on a valve controlling the flow of fuel to a heat exchanger.
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Fieldbus & Industrial Networking
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On a farm in the USA, valuable ammonia is extracted from slurry and processed into ammonium sulphate. NSI Byosis has transformed this complex process into a flexible modular system. This modular approach requires an automation solution with flexible scalability in both hardware and software, which this Dutch company has found in PC-based control from Beckhoff.
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I was giving a course at a remote mine in the middle of the Namibian desert. We were discussing tuning responses, and as I always do on my courses, I mentioned that in my opinion ¼ amplitude damped tuning is not desirable, and is in fact not good.
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Fieldbus & Industrial Networking
In safety-critical industries like nuclear, petrochemical and oil and gas, installing a new industrial cable network is an extremely complicated task. Gary Bradshaw, a director of industrial network specialist, Omniflex explains why this is often unnecessary as plants are likely to have existing cabling capable of being used to create new industrial networks.
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Fieldbus & Industrial Networking
Profitek provides cutting-edge industrial networking, automation and IoT solutions for harsh environments.
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Fieldbus & Industrial Networking
The GW-101-LORA-4AO is the ultimate industrial LoRaWAN gateway, combining advanced IoT connectivity with expandable I/O.
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Fieldbus & Industrial Networking
The ML-NET-INJECT series sets the standard for industrial PoE, featuring IP68-rated RJ45 connectors and military-grade components for extreme reliability.
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Fieldbus & Industrial Networking
Balluff IO-Link Network Modules enable seamless, intelligent communication between sensors, actuators and control systems. Designed for Industry 4.0, they provide real-time data exchange, simplify wiring, and enhance diagnostics.
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