InTouch是本系統中有信息交互的中樞，航班信息和報文信息都是通過InTouch發送給下位控制機PLC的。InTouch是由wonderware公司開發的面向工業控制的人—機對話界面（HMI）開發工具，提供了組態環境WindowMaker和運行環境WindowViewer。在組態環境下定制系統，進行數據庫組態，畫面組態，定義系統的數據采集和控制任務。在運行環境中通過執行 InTouch Quickscripts來實施這些任務，進行報警和行歷史數據的記錄和報告，并將數據實時傳輸給本站的其它任務和網上其它工作站。InTouch7.0支持動態數據交換(DDE)，能夠用作 DDE 和 Suitelink 通訊協議的客戶和服務器。通過DDE和Suitelink，InTouch7.0能與其他 Windows 程序、Wonderware I/O 服務器和第三方 I/O 服務器程序實現通訊。本系統使用Wonderware的以太網（EtherNet）通訊協議服務器ABTCP，實現INTOUCH與下位PLC通訊。
與DDE命名規則一致，InTouch通過一個三部分命名約定來標志在I/O服務器程序中的數據元素，包括VIEW(應用程序名)，TAGNAME(主題名）和ActualTagname （項目名）。為了從另一個應用程序中得到數據，客戶機程序(InTouch)通過這三項打開到服務器程序的一個通道。此外，它必須知道提供該數據值的應用程序名，應用程序中包含該數據值的主題名和項目名。當另一Windows應用程序從InTouch中請求一個數據值時，它也必須知道這三個I/O地址項。I/O類型標記名必須與一個訪問名相聯系，訪問名包含了用來與其他I/O數據源通訊的信息，這些信息包括節點名，應用程序名和主題名。
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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