InTouch是本系统中有信息交互的中枢，航班信息和报文信息都是通过InTouch发送给下位控制机PLC的。InTouch是由wonderware公司开发的面向工业控制的人—机对话界面（HMI）开发工具，提供了组态环境WindowMaker和运行环境WindowViewer。在组态环境下定制系统，进行数据库组态，画面组态，定义系统的数据采集和控制任务。在运行环境中通过执行 InTouch Quickscripts来实施这些任务，进行报警和行历史数据的记录和报告，并将数据实时传输给本站的其它任务和网上其它工作站。InTouch7.0支持动态数据交换(DDE)，能够用作 DDE 和 Suitelink 通讯协议的客户和服务器。通过DDE和Suitelink，InTouch7.0能与其他 Windows 程序、Wonderware I/O 服务器和第三方 I/O 服务器程序实现通讯。本系统使用Wonderware的以太网（EtherNet）通讯协议服务器ABTCP，实现INTOUCH与下位PLC通讯。
与DDE命名规则一致，InTouch通过一个三部分命名约定来标志在I/O服务器程序中的数据元素，包括VIEW(应用程序名)，TAGNAME(主题名）和ActualTagname （项目名）。为了从另一个应用程序中得到数据，客户机程序(InTouch)通过这三项打开到服务器程序的一个通道。此外，它必须知道提供该数据值的应用程序名，应用程序中包含该数据值的主题名和项目名。当另一Windows应用程序从InTouch中请求一个数据值时，它也必须知道这三个I/O地址项。I/O类型标记名必须与一个访问名相联系，访问名包含了用来与其他I/O数据源通讯的信息，这些信息包括节点名，应用程序名和主题名。
InTouch is the information exchange center in the system. Flight information and message information are sent to the lower control computer PLC through InTouch. InTouch is a man-machine interface (HMI) development tool for industrial control developed by Wonderware company. It provides the configuration environment windowmaker and the running environment windowviewer. Customize the system in the configuration environment, configure the database and screen, and define the data acquisition and control tasks of the system. Implement these tasks by executing InTouch quickscripts in the operating environment, record and report alarm and line historical data, and transmit the data to other tasks in the station and other workstations on the network in real time. Intouch7.0 supports dynamic data exchange (DDE) and can be used as a client and server for DDE and suitelink communication protocols. Through DDE and suitelink, intouch7.0 can communicate with other windows programs, Wonderware i/o servers, and third-party i/o server programs. This system uses Wonderware's Ethernet communication protocol server abtcp to realize the communication between InTouch and lower PLC.
Consistent with DDE naming rules, InTouch uses a three part naming convention to identify data elements in i/o server programs, including view (application name), tagName (topic name), and actualtagname (project name). In order to get data from another application, the client program (InTouch) opens a channel to the server program through these three items. In addition, it must know the name of the application that provided the data value, and the application contains the subject name and project name of the data value. When another windows application requests a data value from InTouch, it must also know the three i/o address entries. An i/o type tagName must be associated with an access name that contains information used to communicate with other i/o data sources, including the node name, application name, and topic name.
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