How To Generate Error In Labview
ForumsCategoryBoardDocumentsUsers turn on suggestions Auto-suggest helps you quickly narrow down your search results custom error labview by suggesting possible matches as you type. Showing results for Search instead labview error handling for Did you mean: Reply Topic Options Subscribe to RSS Feed Mark Topic as New Mark Topic as Read Float this Topic to the Top Bookmark Subscribe Printer Friendly Page All Forum Topics Previous Topic Next Topic Best way to throw custom error from SubVI Best way to throw custom error from SubVI [Edited] Wuhtzu Member 12-07-2010 10:02 AM - edited 12-07-2010 10:04 AM Options Mark as New Bookmark Subscribe Subscribe to RSS Feed Highlight Print Email to a Friend Report to a Moderator Hi I was wondering how best to throw error messages from a SubVI. Say I have a toplvl VI called Caller.vi which calls Sub.vi. The toplvl vi whishes to use the Sub.vi's error out cluster to determine what to do - e.g. halt execution of the toplvl vi if the Sub.vi throws an error. Easy enough if the Sub.vi just have to pass errors from build in LabView functions and VI's, but how to do it if the sub vi has to throw a custom error upon some condition? Say the sub vi takes a certain number of inputs and that the inputs need validation before executing what ever the sub vi does. E.g. a certain algorithm implemented is only meaningfull if a>10. My own thought is this: Simply select between an empty/no-error error cluster and an error-cluster containing the wanted custom errorcode and description. The area circled in blue is the interesting part: Is that the worst idea you've iever seen implemented? The only other real suggestion I've been able to find (which originally adresses another issue, but shows a method for "throwing an error") is a VI post
NI Developer Community Currently Being Moderated Programmatically Generate Custom Error Codes/Messages VERSION 2 Created on: Feb 11, 2010 4:01 PM by BCho - Last Modified: Jun 17, 2016 2:54 PM by example_scrub OverviewThis demonstrates using the General Error Handler VI to report your own custom errors.DescriptionThis examples shows how to use the general error handler to programmatically generate custom error messages. In the course of an application it may be necessary to generate an error even https://forums.ni.com/t5/LabVIEW/Best-way-to-throw-custom-error-from-SubVI/td-p/1332790 though nothing has caused LabVIEW to generate an error. For example, if you are performing a file I/O task and LabVIEW generates error code 4, an error has occurred where the "End of file encountered." However, if you want to report an error even though nothing has gone wrong as far as LabVIEW is concerned, https://decibel.ni.com/content/docs/DOC-9557 using the general error handler allows you to generate custom error codes.An example of a situation where this might apply:Your program is used to run a motor. When motors run, they generate heat; so in your program you are also monitoring this temperature. In the rare situation where your motor overheats, you want to generate an error, turn off the motor, and end your program. So, even though the temperature of your motor being too hot would not cause LabVIEW to report an error, you need LabVIEW to report that the motor has overheated and close down in a controlled fashion.RequirementsLabVIEW 2009 (or compatible)Steps to Implement or Execute Code-Open Error_Example.vi-Run the VI-Trip error 5003 or 5004 with one of the switches.-Notice how LabVIEW reports the error as if it were built-inAdditional Information or References **This document has been updated to meet the current required format for the NI Code Exchange.** Attachments: Error_Example.vi (15.6 K) LabVIEW 2009 1,064 Downloads Like (1) 9107Views Categories: Example
Федерация 中国 (China) 日本 (Japan) 대한민국 (Korea) 台灣 (Taiwan) See All Countries Toggle navigation INNOVATIONEN PRODUKTE SUPPORT COMMUNITY Deutschland NIHome > Support > GettingStartedwithNIProducts > LearnNILabVIEWBasics > HandlingErrors Getting Started with NI Products Install Software and Drivers Connect and Set Up Hardware Learn NI LabVIEW Basics Environment https://www.ni.com/getting-started/labview-basics/handling-errors Basics Dataflow Programming Basics Common Tools Debugging Tools Execution Structures Data Structures Passing Data Between Loop Iterations Handling Errors Finding Examples In-Product Help Online Help Additional Help Begin Your Application 1 Install Software 2 Connect Hardware 3 Learn LabVIEW 4 Begin Your Application Handling Errors in LabVIEW Print Included in the Section Automatic Error Handling Manual Error Handling Error Clusters Explain Error Using While Loops for Error how to Handling No matter how confident you are in the VI you create, you cannot predict every problem a user can encounter. Without a mechanism to check for errors, you know only that the VI does not work properly. Error checking tells you why and where errors occur. Automatic Error Handling Back to top Each error has a numeric code and a corresponding error message. By default, LabVIEW automatically handles any error when a VI runs by suspending how to generate execution, highlighting the subVI or function where the error occurred, and displaying an error dialog box. To disable automatic error handling for the current VI, select File»VI Properties and select Execution from the Category pull-down menu. To disable automatic error handling for any new, blank VIs you create, select Tools»Options and select Block Diagram from the Category list. To disable automatic error handling for a subVI or function within a VI, wire its error out parameter to the error in parameter of another subVI or function or to an error out indicator. Manual Error Handling Back to top You can choose other error handling methods. For example, if an I/O VI on the block diagram times out, you might not want the entire application to stop and display an error dialog box. You also might want the VI to retry for a certain period of time. In LabVIEW, you can make these error handling decisions on the block diagram of the VI. Use the LabVIEW error handling VIs and functions on the Dialog & User Interface palette and the error in and error out parameters of most VIs and functions to manage errors. For example, if LabVIEW encounters an error, you can display the error message in different kinds of dialog boxes. Use error handling with the debugging tools to find and manage errors. When you perform an