SIGN function

Sign indicator of x. SIGN (x) returns a Boolean True (1) value if the sign of x (operand one) is positive. It returns a Boolean False (0) value if x is negative.

Syntax:

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

Example:

VAR
   T63; T64; T17; T18; (* Temporary values *)
END_VAR;
T63 := .5;
T64 := -15.803;
T17 := SIGN(T63);
T18 := SIGN(T64);

The above example shows T63 set to the value of .5 and T64 set to the value of -15.803. T17 is set to the result of SIGN(T63), which is 1 and T18 is set to the result of SIGN(T64), which is 0.