LabVIEW操作数据库的例子 在LabVIEW中，如何将日期时间类型的数据写入数据库？ 首先要在数据库中创建对应类型的table，创建好的table如下图所示。 如果命令采用，INSERT INTO Measurement (TestID,[DateTime]) VALUES (1,'2015-01-28 06:52:16'); 注意这里的[DateTime]是加了方括号的，日期的内容增加了引号，或者用#也可以。 或者用考虑到写入参数灵活性，采用DB Tools Insert Data VI这种方式更加适合LabVIEW。如下图所示。 在 Access 的日期时间型字段里无法存取毫秒，通过%<%x %X>T转换为秒.参见如下的命令“Select * From Pressure Where ([DateTime] Between #%<%x %X>T# And #%<%x %X>T#)” 查询开始和结束时间的命令为“Select TOP 1 [DateTime] From Pressure”“Select TOP 1 [DateTime] From Pressure or

最全的Teststand 教程（英文版） Introduction Introduction.................................................................................................................xi Technical Support Options.........................................................................................xii Course Objectives.......................................................................................................xiii Course Description .....................................................................................................xiii Course Map.................................................................................................................xiv Items You Need for this Course Module:...................................................................xv Note on Hands-On Exercises......................................................................................xvi Lesson 1 Introduction to TestStand Introduction.................................................................................................................1-1 The Role of a Test Executive......................................................................................1-2 The TestStand Goal ....................................................................................................1-3 What is TestStand?.....................................................................................................1-4 The TestStand Architecture........................................................................................1-5 The Sequence Editor...................................................................................................1-6 The Operator Interface................................................................................................1-7 The TestStand Engine.................................................................................................1-8 Module Adapters ........................................................................................................1-9 The TestStand Architecture........................................................................................1-10 Summary.....................................................................................................................1-13 Exercises Exercise 1-1 Running a Sequence File..................................................................1-15 Exercise 1-2A Running a Sequence File from the LabVIEW Operator Interface ............................................................................1-20 Exercise 1-2B Running a Sequence File from the LabWindows/CVI Operator Interface..............................................1-25 Contents TestStand Development Course Manual iv www.ni.com Lesson 2 The TestStand Environment Introduction.................................................................................................................2-1 What is a Sequence?...................................................................................................2-2 Step Groups.................................................................................................................2-3 TestStand Sequence Files ...........................................................................................2-4 Debugging Tools.........................................................................................................2-5 The TestStand Process Model.....................................................................................2-8 The Default Process Model: Test UUTs Mode ..........................................................2-9 TestStandModel.seq....................................................................................................2-10 The Role of the Process Model within the TestStand Architecture............................2-11 Exercises Exercise 2-1 Understanding the Sequence File.....................................................2-15 Exercise 2-2 Running a Sequence File with Breakpoints and Single Stepping.................................................................................2-21 Exercise 2-3 Understanding the Process Model....................................................2-28 Lesson 3 Creating Sequences Introduction.................................................................................................................3-1 How to Create Test Sequences ...................................................................................3-2 Action 1 : Specify the Adapter ...................................................................................3-3 Action 2: Select the Step Type ...................................................................................3-4 Step Types...................................................................................................................3-5 Action 3: Specify the Test Module.............................................................................3-6 Specifying the Module................................................................................................3-7 Specifying the Module: Search Directories................................................................3-8 Action 4: Configure Step Properties...........................................................................3-9 Step Properties: General Tab......................................................................................3-10 Step Properties: Preconditions....................................................................................3-11 Step Properties: Run Options......................................................................................3-12 Step Properties: Post Actions......................................................................................3-14 Step Properties: Loop..................................................................................................3-15 Step Properties: Expressions.......................................................................................3-17 Exercises Exercise 3-1 Creating Steps in the Sequence Editor .............................................3-23 Exercise 3-2 Configuring Loop Options ...............................................................3-34 Exercise 3-3 Creating a Sequence.........................................................................3-38 Exercise 3-4 Running Sequences in Parallel (Optional) .......................................3-58 Contents © National Instruments Corporation v TestStand Development Course Manual Lesson 4 TestStand Parameters, Variables, and Expressions Introduction.................................................................................................................4-1 Parameters...................................................................................................................4-2 Parameters: Passing data from top-level sequences to subsequences.........................4-3 TestStand Variables....................................................................................................4-4 Local Variables...........................................................................................................4-5 Creating Locals Variables...........................................................................................4-6 Sequence File Global Variables..................................................................................4-8 Creating Sequence File Global Variables...................................................................4-9 Station Globals............................................................................................................4-10 The Expression Browser.............................................................................................4-11 Exercises Exercise 4-1 Using Local Variables......................................................................4-19 Exercise 4-2 Examine the Uses and Differences between Locals, File Globals, and Station Globals.....................................................4-22 Exercise 4-3 Using Expressions to Change Step Properties..................................4-30 Exercise 4-4 Passing Parameters...........................................................................4-39 Exercise 4-5 Dynamically Selecting Which Sequence to Run..............................4-49 Exercise 4-6 Using the UUT Serial Number to Determine Which Sequence to Run...............................................................................4-50 Lesson 5 Creating Test Modules in External Environments Introduction.................................................................................................................5-1 Creating Tests in External Application Development Environments (ADEs)...........5-2 Methods of Data Transfer for TestStand ....................................................................5-3 Method 1—Passing Parameters Directly Using Structures........................................5-3 Using Clusters to Pass Data from LabVIEW..............................................................5-4 Using Structures to Pass Data from LabWindows/CVI..............................................5-6 Method 2—Passing Arbitrary Number of Parameters Directly..................................5-8 Method 3—Using the ActiveX Automation API to Access Properties and Methods .............................................................................................................5-12 What is ActiveX Automation?....................................................................................5-13 Summary of ActiveX Automation..............................................................................5-14 TestStand and ActiveX Automation...........................................................................5-15 Using TestStand ActiveX Automation Functions in LabVIEW.................................5-16 An Example of Using ActiveX Automation in LabVIEW.........................................5-17 Using ActiveX Automation in LabWindows/CVI......................................................5-18 An Example Of Using The TestStand API Instrument Driver In LabWindows/CVI.....................................................................................................5-19 Using TestStand to Generate Code Templates...........................................................5-24 Code Templates ..........................................................................................................5-25 Contents TestStand Development Course Manual vi www.ni.com Exercises Exercise 5-1A Creating Pass/Fail Tests in LabVIEW..............................................5-27 Exercise 5-1B Creating Pass/Fail Tests with LabWindows/CVI.............................5-33 Exercise 5-1C Creating Pass/Fail Tests for the DLL Flexible Prototype Adapter.............................................................................5-44 Exercise 5-2A Creating Numeric Limit Tests with LabVIEW................................5-54 Exercise 5-2B Creating Numeric Limit Tests with LabWindows/CVI.............................................................................5-59 Exercise 5-2C Creating Numeric Limit Tests for the DLL Flexible Prototype Adapter...............................................................5-67 Exercise 5-3A Debugging Tests Using LabVIEW...................................................5-80 Exercise 5-3B Debugging Tests Using LabWindows/CVI......................................5-84 Exercise 5-3C Debugging Tests that use the DLL Flexible Prototype Adapter.............................................................................5-88 Exercise 5-4A Using the ActiveX API in Code Modules with LabVIEW .................................................................................5-91 Exercise 5-4B Using the ActiveX API in Code Modules with LabWindows/CVI ....................................................................5-100 Exercise 5-4C Using the ActiveX API in Flexible DLL Code Modules............................................................................................5-110 Exercise 5-5A Creating a Simple Test Using the LabVIEW Standard Prototype Adapter .............................................................5-122 Exercise 5-5B Creating A Simple Test Using The C/CVI Standard Prototype Adapter .............................................................5-124 Exercise 5-6A Passing Parameters from TestStand to LabVIEW using The TestStand API..................................................................5-125 Exercise 5-6B Passing Parameters from TestStand to LabWindows/CVI using The TestStand API...................................5-127 Exercise 5-7 Passing Data Between TestStand and a Test Module Using the DLL Flexible Prototype Adapter........................5-129 Lesson 6 User Management Introduction.................................................................................................................6-1 The TestStand User Manager .....................................................................................6-2 Default User Profiles in TestStand .............................................................................6-3 Linking Windows System Users.................................................................................6-5 Exercise Exercise 6-1 Setting User Login Access and Privileges........................................6-7 ...............

用于串口通讯，上位机与下位机，计算机与控制或者驱动硬件的通信与数据交换

本文采用虚拟仪器的原理，综合计算机的结构特点，提出了一种以计算机为平台，基于LabVIEW的视频远程监控系统，介绍利用TCP/IP协议进行数据远程监测和控制。利用LOCD技术和TCP/IP协议组以及LabVIEW中的网络传输模块，提出了一种更廉价的监控系统设计方案，具有通用性强，实用价值高以及性能稳定等特点。

可以和PLC等硬件设备进行MODBUS通讯

简要介绍触摸屏的结构及工作原理，并以Burr-Brown公司的触摸屏控制芯片ADS7843为例，介绍触摸屏应用的典型电路和操作。由于ADS78

user.lib

蓝牙技术显得太复杂，功耗大，距离近，组网规模太小等，而工业自动化对无线数据通信的需求越来越强烈，这种无线数据传输必需是高

这是LabVIEW以电子表格控件来读取文本最后一行的源程序。详见本人博客：https://blog.csdn.net/jaysur/article/details/99226617

这是LabVIEW以字符串倒序的形式来快速读取文本最后一行的源程序。详见本人博客：https://blog.csdn.net/jaysur/article/details/99226617