National Instruments BridgeVIEW Human Machine Interface

Human Machine Interface

This chapter explains what a Human Machine Interface (HMI) is and how

you can monitor and control tags from your HMI. This chapter also

describes several general principles of HMI programming in G, and

provides activities that illustrate how to accomplish the following:

• Build your HMI using the HMI G Wizard

• Customize front panel objects with imported graphics

Note To understand the concepts, and to complete most tasks associated with building

an HMI, you should be familiar with the basic functionality of G programming.

If you have not completed the G Tutorial section of this manual, you should do

so now.

The example diagrams shown in this chapter are taken from several HMI

examples you can find in the BridgeVIEW\Examples\HMI Examples

folder.

An HMI is the interface through which an operator interacts with the

BridgeVIEW system and with the outside environment that BridgeVIEW

monitors and controls. The operator is the end user of the system.

To monitor the changes in configured tags in real time, you can build one

or more Human Machine Interface (HMI) applications.

BridgeVIEW includes a set of VIs with which you can control your HMI,

access the Real-Time Database and Citadel, perform calculations and logic,

and switch between different displays. The BridgeVIEW VI library

includes Alarms and Events VIs, Historical Data VIs, System VIs, Tags

VIs, and Tag Attributes VIs. For more information about these VIs, see

Appendix A, HMI Function Reference. For more information about the

G VI Library, see the Online Reference.