Topic: DMD0086

ABS - Absolute Value

This instruction can only be used in the Expression parameter of the Calculate Expression (MATH) instruction.

The Absolute Value (ABS) math function returns the absolute value of its only expression parameter. If the expression’s value is negative, it negates the value to make it positive. Otherwise, it returns the expression's value.

The expression parameter consists of all the text between the bounding parentheses. Any expression parameter can be a constant value, a bit or numeric memory location, an arithmetic expression, and/or mathematical function or other expressions up to a maximum of 1024 characters. Expressions can be nested, so use of parentheses is recommended to ensure proper evaluation order.

Using the Math box example to the right:

• If R1 = 3.14159 the result in R0 would be 3.14159
   

• If R1 = -3.14159 the result in R0 would be 3.14159

See Also:

• MATH - Calculate Expression

Rung Example: