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IIoT应用机诊断
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2017-05-11
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IIoT应用机诊断
电子工业在制造业中的应用近年来取得了巨大的飞跃，主要归功于智能制造的举措，如德国政府主导的工业4。物联网带来的产业发展势头对制造业自动化也产生了重大影响。事实上，这句话的物联网产业，采用或IIoT，尊重为数据收集和分析的群众，任何智能工厂实现控制方面需要物联网高度相关的基本概念。在许多方面，IIoT一直被视为一个连接和控制方法更能够立即提供生产力和效益比其他基于物联网的项目。
工业自动化系统自2000年代早期就已经在工厂实施，在这个阶段许多专有的通信协议和网络拓扑被用来连接自动化设备。这导致制造商的互操作性的方式很少，并捆绑工厂的实施，以潜在的一个供应商。除此之外，以太网已经成为世界上的网络协议，虽然它的一些缺点，使其应用在工厂自动化项目有限公司。
The primary challenge with standard Ethernet is that the MAC layer is not able to support real-time low latency data transfers. Designed for the transfer of large amounts of information across an enterprise network， the protocol is not suitable for moving the relatively small amounts of information needed for industrial control. For example， controlling a valve requires very little information to make it turn and for a sensor to report its current open/closed status. The other aspect of this is that， with Ethernet， control of the network is down to the devices attached to it， thus making it hard to predict when something will transfer. This， for a time-critical manufacturing process， is a major concern.
Control of manufacturing robots， valves， actuators etc.， must take place in a deterministic manner. Diagnostics of the automation equipment in operation also requires a very deterministic response within the control instruction process such that an operation can be immediately halted before any other instruction is executed. It should also be noted that the focus of diagnostics is not only on the operation of the controlled device， such as a motor， actuator or valve， but of the network and associated network hardware too. German manufacturer Beckhoff had seen the wide adoption potential for Ethernet and developed its own Fieldbus protocol in order to correct the low bandwidth and deterministic nature within the standard Ethernet. This became known as EtherCAT? （Ethernet for Control Automation Technology） and is now an open standard and has become adopted by many thousands of automation equipment suppliers.
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