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Exercise: Changing the screen shown by a PageLink object
a) Create Create an analog tag named ‘SCREEN’ and specify its initial value as 1. Set the minimum and maximum values to 1 and 3, respectively.
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b) Create Create three popup pages and reduce their sizes so that they can fit inside of the main page.
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c) In In popup page 1, you can view temperatures and elapsed fire time for each floor. Alarms are displayed in the alarm summary object.
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d) In In popup page 2, you can monitor fire and sprinkler status.
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e) In In popup page 3, temperatures of each floor will be shown in the trend graph. You may also check the alarm history in the alarm summary object.
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f) Click Click [Draw] – [Pagelink] to configure a page link object in on the main screen. Select ‘Specify by Tag Values’ for the page control option, then choose ‘Popup Page’ as the page type. Choose ‘SCREEN’ as the page select tag.
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g) Create Create left and right touch objects which change the value of the ‘SCREEN’ tag. Assign command expressions as shown in the table below.
 | Function | Touch |
Action | Command expression | |
Command | SCREEN = SCREEN – 1; | |
 | Function | Touch |
Action | Command expression | |
Command | SCREEN = SCREEN + 1; |
h) Launch Launch the project in Xpanel or the simulator. When you click the left and right touch buttons, the page link screen should switch between pages.
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