labview modbus通讯方法通过将连接到任何.pdfVIP

Connect LabVIEW to Any PLC With Modbus Publish Date: Apr 01, 2014 Overview NI LabVIEW software can communicate with a progr ble logic controller (PLC) in a variety of ways. Modbus is a ser communication protocol published by Modicon in 1979 to communicate with PLC, and was then extended to the TCP pro Modbus became one of the de facto standard communications protocols in the industry because its availability. In this tut learn how to use LabVIEW to communicate with worked PLC using Modbus. The LabVIEW Datalogging and Supervisory Control (DSC) Module is used in this tutorial. This module ludes tools for data to worked historical database, real-time and historical trending, managing alarms and events working LabV Real-Time targets and Modbus devices into one complete system, and adding security to user interfaces. With these fea LabVIEW es a powerful HMI/SCADA package for industrial control applications. Requirements Windows 7/Vista/XP/Server 2003 R2/Server 2008 R2 NI LabVIEW Full Development System and LabVIEW DSC Table of Contents Creating a Modbus Master I/O Server In this section, you will create a LabVIEW interface to the Modbus addresses called an I/O Server. The I/O Server autom updates LabVIEW with the current values. 1. In the Getting Started window of LabVIEW, click File»New Project. This opens a new LabVIEW Project. 2. If the Context Help window is not visible, press Ctrl+H to dis y the window. Keep this window open for helpful infor about items under your cursor. 3. In the LabVIEW Project window, right-click My Compu nd select New»I/O Server, as shown in Figure 1. Figure 1: Creating a New I/O Server through the LabVIEW Project 1. Select Modbus in the Create New I/O Server Window and click Continue. 2. Select Modbus Ethe from the Model drop down