Set up numeric displays, How values are shown, Problems with showing values – Rockwell Automation FactoryTalk View Machine Edition Users Guide User Manual
Page 420: Set up numeric displays -28
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In the Common tab, specify the button’s spacial properties, name, and visibility.
In the Connections tab, specify the tags with which the button exchanges data. If
variable ramp and limit values are selected in the General tab, assign tags or
expressions to the Ramp and Limit connections. Ramp buttons have no Indicator
connection. For information about assigning tags, see page 20-36.
For details about the options in the tabs, see Help.
3. When you are finished, click OK.
Set up numeric displays
Use the numeric display object to show the operator numeric information from the data
source. For example, you might use a numeric display to show the current temperature of
an oven.
How values are shown
The numeric display shows the value of the Value connection at the data source. The value
shown depends on whether the Value connection value is a floating-point number or an
integer. Integer values are shown as is. Floating-point values are rounded to fit the display.
The decimal places option also affects how floating point numbers are shown.
For example, if the numeric display is set up to show 6 digits, with one decimal place,
1234.56 is rounded to 1234.6. 1234.44 is rounded to 1234.4. The decimal counts as one of
the digits.
For more information about how values are rounded, see page 7-2.
Problems with showing values
If the Value connection is unassigned, the numeric display is filled with asterisks (*).
If the integer portion of the value, including the decimal point and minus sign,
contains more digits than specified for the display, the numeric display is filled with
asterisks.
If the numeric display is sized so that the value cannot be fully shown, the value is
truncated and the last showable digit is replaced with an asterisk.
If the value doesn’t fit on the first line of the display, and there is room for a second
line, the value continues onto the second line.