Numeric Display Properties - General tab

The following table shows option under
Expression
.
Options
Description
Expression
Type an expression or select a tag that will determine the value to be shown in the numeric display. The buttons below the Expression box display elements that can be used in it.
An expression is a mathematical or logical equation that returns a value. It can contain tag names, constants, mathematical, relational, logical and/or bitwise operators and functions. A tag name can also stand alone as an expression.
Check Syntax
Click this button to check the syntax of the expression you have entered.
Alarms
Click this button to open the
Alarm Source Browser
 and look for an alarm source, such as a Microsoft SQL database, that accepts alarm and event data from FactoryTalk Alarms and Events. For more information about alarm and event data sources, click Help (the question mark button) in the
Alarm Source Browser
.
The following table shows options under
Numeric
.
Options
Description
Format
Select a numeric format for the value. It can be
Decimal
,
Hexadecimal
,
Octal
,
Binary
,
Floating Point
 or
Show exponent
.
Overflow
This only applies for the
Floating Point
 format.
If the number to be displayed is longer than the field length, it can be displayed as an exponent, rounded up to fit the field, or filled with asterisks. If you do not specify an overflow format, the display field will be filled with asterisks.
For all formats other than floating point, overflow values are displayed as asterisks.
Field Length
The number displayed reflects the size of the rectangle you have drawn for the box. To change the length type another number in this box. Be sure that it is long enough to accommodate the results of the expression.
Show Digit Grouping
Select this check box to show digit grouping of the value at runtime.
The digits are divided in groups of three by the Windows digit grouping symbol. The digit grouping symbol uses the numeric format of the current runtime language. The format can be configured in the Windows Region and Language settings of Control Panel.
For example, if the digit grouping symbol is a comma, the value
12345678
is shown as:
  • 12,345,678
     if you select the check box.
  • 12345678
    if you clear the check box.
Fixed decimal Places
Select this option and type the number of places you want to show after the decimal point. The number must be at least one less than the field width.
This option only applies for the
Floating Point
 or
Show exponent
format.
Dynamic decimal places
Select this option and specify a numeric tag variable as the number of places you want to dynamically show after the decimal point. The number must be at least one less than the field width.
This option only applies for the
Floating Point
 or
Show exponent
format.
The following table shows other options on the
General
 tab.
Options
Description
Leading Character
Select blanks or zeros.
Justification
Select left, center, or right justification.
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