Attention

IronPLC can only run very simple programs. The steps described are accurate but many language features are not yet supported.

LOG¶

Returns the base-10 logarithm of a numeric input.

IEC 61131-3	Section 2.5.1.5.2
Support	Not yet supported

Signatures¶

#	Input (IN)	Return Type	Support
1	`REAL`	`REAL`	Not yet supported
2	`LREAL`	`LREAL`	Not yet supported

Returns the common logarithm (base 10) of IN. The input must be positive; the result of LOG applied to zero or a negative value is undefined.

result := LOG(REAL#100.0);  (* result = 2.0 *)
value := LOG(LREAL#1000.0); (* value = 3.0 *)