【摘要】 基金会现场总线(FF)对离散信号的处理能力不强,需要在其上集成PLC以弥补其不足。为此,研制了基于基金会现场总线高速以太网(FF HSE)的软PLC设备。阐明了该设备的系统组成、工作原理、开发系统和目标系统的设计与实现方法。提出了一种新颖的设计方案:在软PLC目标系统中采用2个嵌入式控制器分别实现系统的通信与控制功能。用于通信功能的嵌入式控制器把软PLC的分散控制功能集成到了基金会现场总线上。实验结果表明,设备对高速离散信号的处理能力强,能够无缝地集成于FF HSE上,有效地增强了FF现场总线控制系统对离散信号的处理能力。更多还原

【Abstract】 Because of the weak processing ability on discrete signals of the Foundation Fieldbus(FF),it is necessary to integrate PLC into it to make up its shortage.Therefore,a soft PLC device based on the FF HSE is developed.The construction of system,operating principle,design and realization methods of the developing system and the target system of this device are illustrated.A new solution is put forward: two embedded controllers are used to realize the communication and control functions in the soft PLC target system respectively,and the embedded controller used for communication function integrates the dispersed control functions of the soft PLC into FF.The simulation experiment results have proved that this device,which can be integrated into FF HSE seamlessly,has powerful processing ability on high-speed discrete signals and improves the processing ability on discrete signals of the FF control system effectively.更多还原