在这种情况下仅需下载修改过的内容(而不是
全部覆盖)，对其它未经修改而正在运行的程序不会造成任何影响，从而保证生产过程无扰。
操作管理级主要包括操作站、工程师站、数据网关、管理计算机及相应软件，另外还包括打印
机、操作台等辅助设备。操作站的任务是生产监控，即综合监视来自过程控制级的所有信息，进行监
示报警、趋势生成、记录、打印输出及人工干预操作(发送命令、修改参数等)。工程师站用于系统
软件组态和调试投运，它无需永久性接入系统，操作站也可兼作工程师站(需按工程师权限登录)。
调试期间CBF (Control Builder F)需从conf iguration(组态)方式
切換至commiss ioning (调试)方式，才可调用专门的编辑器以显示组
态好的程序。与组态时不同，调试时可显示I/0变量的实时值以及数
字信号的实时状态(0或1)，例如FBD图中数字信号线的外形变化(实
线或虚线)就反映其状态。过程变量的当前值可同时反映在数值窗口
与趋势窗口中，为功能测试与调整提供了极其方便的手段。
●Profibus field controller can be integrated through FDT/DTM technology
line equipment
system structure
The Freelance 800F process control system is divided into operator levels
and process control level. The operator level contains controls for operation and display.
Archiving and logging, trending and alarming functions. Controller executes open loop
and closed loop control function.
Freelance 800F DigiVis Operator Level
DigiVis operator stations use PC hardware, either standard commercial
Business PCs can also be industrial-grade PCs and run on Micro-
under soft Windows operating system. DigiVis supports dual-screen display operation
operating technology, that is to say, two operations can be performed using one PC
station and operate with a mouse and a keyboard.
Operator level can install one engineering station and several
