LOG function

Log base 10 of x (operand one). LOG (x) returns the logarithm base 10 of x when successful. If x is not positive, LOG returns a zero value and BAD status.

Syntax:

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

Example:

VAR
   T63; T64; T17; T18; (* Temporary values *)
END_VAR;
T63 := .5;
T64 := 15.803;
T17 := LOG(T63);
T18 := LOG(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 LOG(T63), which is -0.301029995664 and T18 is set to the result of LOG(T64), which is 1.198739540104.