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2.2 一卡通系统的网络结构与组成 通过上节的介绍,可得知一卡通系统实际上是由两部分组成的:实时控制域和管理信息域。用于门禁、巡更、消费、考勤的大量智能卡读卡器、智能卡控制器以及其它传感器、执行器都属于低速、实时控制域。传统的控制网常采用RS-485作为分散的控制设备、数据采集设备之间的通信连接;近年来,已广泛采用先进的LonWorks控制网络。各智能卡分系统的工作站和上位机则居于系统的高速管理信息域,这里涉及大量的数据传递,要满足各种管理的需要,如设备管理、报警处理、信息处理、
2.2 Card System Network Structure and Composition Through the introduction of the previous section, we learned that the card system is actually composed of two parts: the real-time control domain and management information domain. For access control, patrol, consumption, attendance a large number of smart card reader, smart card controller and other sensors, actuators are low-speed, real-time control domain. The traditional control network often uses RS-485 as a distributed control device, data acquisition equipment, communication between the connections; in recent years, has been widely used advanced LonWorks control network. The smart card subsystems workstations and PC are living in the system of high-speed management information domain, involving a large number of data transfer, to meet the needs of various management, such as equipment management, alarm processing, information processing,