PIsyste应用培训.ppt

All rights reserved, OSIsoft Inc. ? 2004 Bar Graphs The range of values can be the maximum and minimum values specified in the point attributes. Or, a bar can be designed to show a specific range of values. For example, if a tag’s specified value is between 0 and 100 but it typically falls between 0 and 30, a bar can designed to show that range. However, if the value is outside the range of the bar, the bar will appear the same as a value right at one of the limits of the bar. The start of the bar may be within the limits of the bar. This lets you display deviations from a standard or target value. Bad values are shown with hash marks across the entire bar. All rights reserved, OSIsoft Inc. ? 2004 Dynamic Values A value is shown as a number or a digital state string. The tag name and timestamp may also be shown. All rights reserved, OSIsoft Inc. ? 2004 Multi-State Objects A Multi-State symbol is one that changes color to reflect changes in value for a particular tag. Any object except a trend, bitmap, button, or OLE object can be made a MultiState symbol by assigning a tag to it. You determine the number of value ranges, and the colors assigned to each range. As the value of the tag changes, the MultiState symbol changes color to reflect the current value. You can make a symbol seem to disappear by setting a state color to the background color or to a color of none. For alarms or other purposes, you can set a state color to blink. After you have drawn a symbol or copied one from the Symbol Library, select it with the Build Mode pointer. Select Multi-State from the Edit menu or click the Multi-State Symbol button. The Multi-State Symbol dialog box is displayed. In the Tag Name text box, type the name of the tag you want to assign to the symbol. orClick the Tag Search button to use the Tag Search feature. Select the number of states for the symbol. If the number of states is not entered, the number defaults to 2. For digital tags, the number of states is autom