共查询到19条相似文献,搜索用时 171 毫秒
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Profibus-DP总线技术是西门子数控系统里常用的通信技术,Profibus总线故障报警是西门子系统数控机床维修当中的常见故障。本文通过典型实例说明了Profibus总线报警的处理过程,给出了解决问题的基本思路和方法,对Profibus总线故障报警的维修具有一定的工程实际意义。 相似文献
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简述了在安阳钢铁集团有限公司使用的变频器Profibus-DP现场总线控制系统,给出了该系统的网络结构及计算机与变频器之间的通讯协议,描述了该系统的功能码设置步骤和编程过程。 相似文献
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在分析传统FMS通信网络缺点的基础上,通过比较,提出将现场总线网络应用于柔性制造系统的方案。利用西门子PLC S7-300作为柔性制造系统单元的主站,构建了基于Profibus-DP总线的FMS通信与控制的网络系统,保证了FMS-50单元层与设备层的信息通讯。同时在监控主站上运用WinCC组态软件实现对物流系统的实时监控。 相似文献
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基于锻压机械对速度可调、精度可控等方面的要求,从软件和硬件两方面阐述了Profibus-DP现场总线在西门子PLC s7-300与位移传感器通讯中的应用,快捷而可靠地实现信息数据的传输交换。该通讯方法成功应用于锻压设备中。 相似文献
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着重介绍TIFMAS-Interface总线系统在MK84250/H大型数控轧辊磨床上的硬件和软件的组态方法,通过PLC硬件组态设置,将IFMAC1335网关挂到西门子Profibus-DP总线上建立通讯,从而保证了IFM总线系统能够正常运行。IFMAS—Interface总线系统的出现和发展,有效地促进网络集成自动化系统和工业控制系统,现场总线技术融合技术构建的全集成自动化系统及信息网络技术,可以有效地减少机床布线、节约成本、降低机床故障率、提高生产效率,具有推广前景。 相似文献
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浅谈Profibus总线电缆的安装规范 总被引:1,自引:0,他引:1
王顺菊 《锻压装备与制造技术》2011,46(1):54-56
通过调研,对Profibus现场总线电缆在奇瑞汽车安装中暴露的问题进行了分析,指出Profibus现场总线常见的接线不规范现象及可能产生的后果.提出了Profibus现场总线电缆的合理安装规范,克服了总线电缆安装出现的问题. 相似文献
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PROFIBUS现场总线的通信原理 总被引:3,自引:1,他引:3
针对PROFIBUS现场总线的网络特点,分析了该总线的网络体系结构,详细探讨了令牌方式与主从方式相结合的存取控制方式、主从方式的优先级调度、令牌传递过程以及逻辑环的建立与环上站的增减;给出了PROFIBUS网络中FDL帧的结构,比较完整地讨论了这种总线的通信原理。 相似文献
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《Science & Technology of Welding & Joining》2013,18(8):769-776
AbstractResistance spot welds were produced in dissimilar combinations of advanced high strength steels. A 600 MPa dual phase (DP) steel was welded to a high strength low alloy, a 780 MPa DP, and a 780 MPa transformation induced plasticity steel. The microstructure and mechanical properties were characterised using metallurgical techniques and lap shear and cross-tension testing. The results show that a pullout failure mode with improved mechanical properties is obtained when DP600 is paired with other advanced high strength steels, compared to the DP600 welded to itself, which is prone to interfacial failure and poor mechanical properties, given the same weld size. An in depth comparison of the interfacial to pullout failure transition in similar DP600 and DP780 and dissimilar DP600–DP780 welds was performed. The results show that the interfacial to pullout transition for the DP600–DP780 welds is significantly lower than with DP600 welded to itself. Increased fusion zone strength through dilution with the DP780 promotes button pullout at smaller weld sizes. Furthermore, it was observed that softening in the heat affected zone of DP780 promoted a pullout failure mode in that material. 相似文献
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《Science & Technology of Welding & Joining》2013,18(6):533-541
AbstractThe effect of dynamic contact resistance (DCR) during MFDC spot welding of dual phase and martensitic steels was evaluated. A comparative analysis of DP590 to DP590 with DP780 to DP780 steel welds, and DP780 to DP780 with M1200 to M1200 steels welds was carried out. The DCR of DP780 steel is higher than DP590 steel during the initial stages of weld time, but is reversed later. The bulk resistance component, which is higher in DP780 steel, is dominant and generates more energy early in the process and controls melting. Although the total energy input is almost same, the higher β-peak and its early occurrence ensures better heat utilisation resulting in larger nugget size. Contrarily, in martensitic steel the interface resistance component remains high throughout the entire welding process and compensates for the lower bulk resistance effect. Even with relatively lower energy input the nuggets produced in M1200 steel are comparable to DP780 steel. 相似文献
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文章介绍了基于Profibus现场总线技术建设的流体测控系统实验台.对系统的功能、工作原理及硬件结构、软件开发环境进行了说明,并通过运行一个实际的实验方案,验证了实验系统的可行性. 相似文献