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Chapter 4 Human Machine Interface Generate the Block Diagram Once you associate a front panel object with a tag and set the various parameters, the HMI G Wizard generates the appropriate code and places it on the block diagram. For example, using the HMI G Wizard for Analog Indicator, shown in Figure 4-1, the following Wizard subdiagram appears on the block diagram. Front Panel Object and Wizard Subdiagram Association When the HMI G Wizard has created a block diagram, there is an association between the front panel object and the generated Wizard subdiagram. The association is protected by a Wizard lock which prevents you from editing the Wizard subdiagram. The lock glyph on the loop, shown at left, indicates that the Wizard has locked the subdiagram. While the subdiagram is locked, you can pop up on the front panel object, select HMI G Wizard…, and change your selections in the dialog box. To edit the Wizard subdiagram, pop up on the Wizard subdiagram and select Release Wizard Lock, as shown below. Note Once you have released the Wizard lock, the association is broken. The Wizard no longer identifies the Wizard subdiagram as being created by it. Activity 4-1. Use the HMI G Wizard Your objective is to create a simple HMI using the HMI G Wizard. BridgeVIEW User Manual 4-8 © National Instruments Corporation
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