即以监控工作站和工控网络构成，与 PLC 程控器相连， 实现对流程设备的上位机监控。上位系统由监控微机 组成，在工控组态软件支持下，通过应用程序完成与 PLC 的通信，以图形方式动态显示生产流程和设备状态等 信息，并可以通过操作界面，实施对过程控制级的控 制。现场数据经应用程序处理后，汇总成报表格式，可 供工作人员查阅。生产管理系统由服务器以及配置在各管理部门的终端来完 成。生产管理的功能，是生产过程中的数据处理，形成各 职能部门所需的信息文件，供统计分析之用，为管理决策 提供数据。在这一级上，从安全性考虑，管理计算机不能 直接干预装卸控制系统。
EXTREME NETWORKS 10911 EPS500 External AC PSU
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