Attention

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

LIMIT

Clamps a value to a specified range.

IEC 61131-3	Section 2.5.1.5.5
Support	Supported

Signatures

#	Input (MN)	Input (IN)	Input (MX)	Return Type	Support
1	SINT	SINT	SINT	SINT	Not yet supported
2	INT	INT	INT	INT	Not yet supported
3	DINT	DINT	DINT	DINT	Supported
4	LINT	LINT	LINT	LINT	Not yet supported
5	USINT	USINT	USINT	USINT	Not yet supported
6	UINT	UINT	UINT	UINT	Not yet supported
7	UDINT	UDINT	UDINT	UDINT	Not yet supported
8	ULINT	ULINT	ULINT	ULINT	Not yet supported
9	REAL	REAL	REAL	REAL	Supported
10	LREAL	LREAL	LREAL	LREAL	Supported

Description

LIMIT(MN, IN, MX) clamps IN to the range [MN, MX]. The function returns:

• MN if IN < MN

• MX if IN > MX

• IN otherwise

The behavior is undefined if MN > MX.

Example

result := LIMIT(0, 50, 100);    (* result = 50 *)
result := LIMIT(0, -10, 100);   (* result = 0 *)
result := LIMIT(0, 200, 100);   (* result = 100 *)

See Also

• MAX — maximum of two values

• MIN — minimum of two values

• SEL — binary selection