|Форум АСУ в Україні
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|Автор:||san [ 11 вересня 2014, 00:33 ]|
|Тема повідомлення:||Network redundancy|
An industrial network infrastructure with built-in network redundancy helps avoid unplanned production stoppages. Protocol explanations follow.
Network redundancy is like an insurance policy for industrial networks. Acting as a quick-response backup system, the goal of network redundancy is to mitigate the risk of unplanned outages and ensure continuity of operation by instantly responding to and reducing the effects of a point of failure anywhere along the critical data path.
Any network that inherently requires high availability or is involved in mission-critical operations will benefit from data path redundancy, providing another pathway to maintain the communication flow. Certainly the use of industrial-grade network components, such as ruggedized switches and hardened or armored cables, alleviates the potential for damage or breakage of parts. However, if a switch should fail or a cable break, a redundant system ensures continuity and avoids disruption of critical communication and data flow. Applications that benefit include process industries operating 24/7 such as metals, pulp and paper, water/wastewater; food and beverage and pharmaceutical plants and some manufacturing in which regulations demand constant data monitoring and precise process control recordkeeping; industries where one process depends on the output of another and production stoppage directly impacts downstream and sometimes upstream operations; and any plant where an interruption or outage may lead to significant product damage, scrap, spoilage, or waste.
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