SIS function blocks > SIS Math Blocks > Logic Solver Calculation function block > Expressions in DeltaV SIS Software > Functions in Logic Solver Expressions

ABS function

ABS (x) returns the absolute value of x (the positive value of operand one).

Syntax:

'external reference' := ABS(Real value);

Example: 

VAR 
   T63; T64; T17; T18; (* Temporary values *) 
END_VAR; 
T63 := -4.6; 
T64 := 5.2; 
T17 := ABS(T63); 
T18 := ABS(T64);

The above example shows T63 set to the value of -4.6 and T64 set to the value of 5.2. T17 is set to the result of ABS(T63), which is +4.6 and T18 is set to the result of ABS(T64), which is +5.2.