Absolute Value (Abs); Relay Ladder; Structured Text; Function Block - Allen-Bradley Logix5000 Reference Manual

Absolute Value (ABS)

dest := ABS(source);
Input Parameter Data Type
EnableIn BOOL
Source REAL
Output Parameter Data Type
EnableOut BOOL
Dest REAL
Compute/Math Instructions (CPT, ADD, SUB, MUL, DIV, MOD, SQR, SQRT, NEG, ABS)
The ABS instruction takes the absolute value of the Source and places the result
in the Destination.
Operands:

Relay Ladder

Operand
Source
Destination

Structured Text

Use ABS as a function. This expression computes the absolute value of source and
stores the result in dest.
See Structured Text Programming
within structured text.

Function Block

Operand
ABS tag

FBD_MATH_ADVANCED Structure

Description
Enable input. If cleared, the instruction does not execute and outputs are not updated.
Default is set.
Value of which to take the absolute value.
Valid = any float
Description
The instruction produced a valid result.
Result of the math instruction. Arithmetic status flags are set for this output.
Rockwell Automation Publication 1756-RM003N-EN-P - October 2011
Type Format
SINT Immediate Tag
INT
DINT
REAL
A SINT or INT tag converts to a DINT value by sign-extension.
SINT Tag
INT
DINT
REAL
for information on the syntax of expressions
Type
FBD_MATH_ADVANCED
Description
Value of which to take the absolute value
Tag to store the result
Format Description
structure ABS structure
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