对实时以太网SERCOS-Ⅲ(SErial Realtime COmmunication System-Ⅲ)的结构、性能进行了深入分析,并着重对其在工业生产复杂环境下实现数控机床间实时性和同步性通讯的机理进行了探讨和模型再现。研究结果表明SERCOS-Ⅲ的软硬件机制可以...对实时以太网SERCOS-Ⅲ(SErial Realtime COmmunication System-Ⅲ)的结构、性能进行了深入分析,并着重对其在工业生产复杂环境下实现数控机床间实时性和同步性通讯的机理进行了探讨和模型再现。研究结果表明SERCOS-Ⅲ的软硬件机制可以保证数控机床在复杂的工业生产环境下实时性和同步性的实现。展开更多
A full distribution CNC system based on SERCOS bus is studied in accordance with the limitations of traditional PC-based motion card. The conventional PC-based motion control card is dispersed into several autonomous ...A full distribution CNC system based on SERCOS bus is studied in accordance with the limitations of traditional PC-based motion card. The conventional PC-based motion control card is dispersed into several autonomous intelligent servo-control units with the function of servo driver. The autonomous intelligent servocontrol units realize the loop control of position, velocity and current. Interpolation computation is completed in PC and the computational results are transferred to every autonomous intelligent servo-control unit by high speed SERCOS bus. Software or hardware synchronization technology is used to ensure all servomotors are successive and synchronously running. The communication and synchronization technology of SERCOS are also researched and the autonomous intelligent servo-control card is developed byself. Finally, the experiment of circle contour process on a prototype system proves the feasibility.展开更多
This paper analyzes cache coherency mechanism from the view of system. It firstly discusses caehe-memory hierarchy of Pentium Ⅲ SMP system, including memory area distribution, cache attributes control and bus transac...This paper analyzes cache coherency mechanism from the view of system. It firstly discusses caehe-memory hierarchy of Pentium Ⅲ SMP system, including memory area distribution, cache attributes control and bus transaction. Secondly it analyzes hardware snoopy mechanism of P6 bus and MESI state transitions adopted by Pentium Ⅲ. Based on these, it focuses on how muhiprocessors and the P6 bus cooperate to ensure cache coherency of the whole system, and gives the key of cache coherency design.展开更多
施耐德基于PacDrive3的伺服控制系统相比之前伺服控制系统,具有模块化编程、减少编程时间、提高编程质量等特点,采用SERCOSⅢ总线通信协议,实现高速数据实时传输,并自带故障诊断软件,方便维护使用,其在包装机械领域,具有很广阔的应用前...施耐德基于PacDrive3的伺服控制系统相比之前伺服控制系统,具有模块化编程、减少编程时间、提高编程质量等特点,采用SERCOSⅢ总线通信协议,实现高速数据实时传输,并自带故障诊断软件,方便维护使用,其在包装机械领域,具有很广阔的应用前景。该文通过FK FX2硬盒包装机为应用背景,详细介绍施耐德新一代伺服控制系统工作原理和其采用的三闭环负反馈工作原理,并结合设备控制网络,进一步阐述施耐德伺服控制系统如何设计、应用,以及如何使用故障诊断软件Schneider Electric Diagnostics快速排除系统故障。这对工程技术人员掌握新一代施耐德伺服控制系统使用很有帮助,能够快速完成设备故障诊断、排查,大大提高设备运行效率。展开更多
文摘对实时以太网SERCOS-Ⅲ(SErial Realtime COmmunication System-Ⅲ)的结构、性能进行了深入分析,并着重对其在工业生产复杂环境下实现数控机床间实时性和同步性通讯的机理进行了探讨和模型再现。研究结果表明SERCOS-Ⅲ的软硬件机制可以保证数控机床在复杂的工业生产环境下实时性和同步性的实现。
文摘A full distribution CNC system based on SERCOS bus is studied in accordance with the limitations of traditional PC-based motion card. The conventional PC-based motion control card is dispersed into several autonomous intelligent servo-control units with the function of servo driver. The autonomous intelligent servocontrol units realize the loop control of position, velocity and current. Interpolation computation is completed in PC and the computational results are transferred to every autonomous intelligent servo-control unit by high speed SERCOS bus. Software or hardware synchronization technology is used to ensure all servomotors are successive and synchronously running. The communication and synchronization technology of SERCOS are also researched and the autonomous intelligent servo-control card is developed byself. Finally, the experiment of circle contour process on a prototype system proves the feasibility.
文摘This paper analyzes cache coherency mechanism from the view of system. It firstly discusses caehe-memory hierarchy of Pentium Ⅲ SMP system, including memory area distribution, cache attributes control and bus transaction. Secondly it analyzes hardware snoopy mechanism of P6 bus and MESI state transitions adopted by Pentium Ⅲ. Based on these, it focuses on how muhiprocessors and the P6 bus cooperate to ensure cache coherency of the whole system, and gives the key of cache coherency design.
文摘施耐德基于PacDrive3的伺服控制系统相比之前伺服控制系统,具有模块化编程、减少编程时间、提高编程质量等特点,采用SERCOSⅢ总线通信协议,实现高速数据实时传输,并自带故障诊断软件,方便维护使用,其在包装机械领域,具有很广阔的应用前景。该文通过FK FX2硬盒包装机为应用背景,详细介绍施耐德新一代伺服控制系统工作原理和其采用的三闭环负反馈工作原理,并结合设备控制网络,进一步阐述施耐德伺服控制系统如何设计、应用,以及如何使用故障诊断软件Schneider Electric Diagnostics快速排除系统故障。这对工程技术人员掌握新一代施耐德伺服控制系统使用很有帮助,能够快速完成设备故障诊断、排查,大大提高设备运行效率。
