IC698CRE040 将多个PLC连接到HMI

　　IC698CRE040 大多数控制系统入门级培训包括可编程逻辑控制器(PLC)—梯形编程、接线输入和输出以及标签数据库和各种数据类型. 人机界面编程高于PLC知识，但是了解各种PLC中的标签数据库可以简化HMI设计过程。

在我自己的控制系统设置中，我最喜欢的“实验”项目之一是找到一个新设备，并找出如何将其连接到一个更大的系统中。显然，这些设备来自各种各样的供应商，所有这些设备必须协同工作。

最常见的触摸屏人机界面的设计对于这种应用，允许多个系统同时运行并在中央操作员屏幕上显示数据。

IC698CRE040 编程包括两个主要部分。首先，也许是最关键的，是理解图形对象例如按钮、数字和文本输入字段、图形数据显示等。这一步遵循在线教程通常很简单。

另一步是我们可能称之为“幕后”的步骤，屏幕上的对象实际上读取或操作PLC内部的标签。这可能不那么简单，因为每个PLC都有不同的标签数据库结构.

IC698CRE040 Most entry-level training for control systems includes programmable logic controllers (PLCs) – ladder programming, wiring inputs and outputs, as well as label databases and various data types Human machine interface programming is superior to PLC knowledge, but understanding the tag databases in various PLCs can simplify the HMI design process.

One of my favorite “experimental” projects in my own control system setup is finding a new device and figuring out how to connect it to a larger system. Obviously, these devices come from various suppliers, and all of these devices must work together.

The most common design of touch screen human-machine interface for this application allows multiple systems to run simultaneously and display data on the central operator screen.

The IC698CRE040 programming consists of two main parts. Firstly, perhaps most importantly, understanding graphic objects such as buttons, number and text input fields, graphic data display, etc. This step is usually easy to follow online tutorials.

Another step is what we may refer to as the “behind the scenes” step, where the objects on the screen actually read or manipulate the labels inside the PLC. This may not be that simple, as each PLC has a different tag database structure