limit

 Function A function calculates a result according to the current value of its inputs. A function has no internal data and is not linked to declared instances. - Limits a numeric value between low and high bounds.

Inputs

Input	Data Type	Range	Unit	Default	Description
IMIN	DINT				Low bound.
IN	DINT				Input value.
IMAX	DINT				High bound.

Outputs

Output	Data Type	Range	Unit	Description
Q	DINT			IMIN if IN < IMIN; IMAX if IN > IMAX; IN otherwise.

Remarks

None

Function Diagram

FBD Language Example

FFLD Language Example

• In the FFLD "Free Form Ladder Diagram" Language, the input rung (EN) enables the operation.
  • The output rung keeps the state of the input rung.
  • The comparison is executed only if EN is TRUE.
  • ENO has the same value as EN.

IL Language Example

• In the IL "Instruction List" This is a low-level language and resembles assembly Language, the first input must be loaded before the function call.
  • Other inputs are operands of the function, separated by comas.

Op1: LD "Ladder diagram"
Ladder logic is a method of drawing electrical logic schematics. It is now a very popular graphical language for programming Programmable Logic Controllers (PLCs). It was originally invented to describe logic made from relays. The name is based on the observation that programs in this language resemble ladders, with two vertical "rails" and a series of horizontal "rungs" between them    IMIN
     LIMIT IN, IMAX
     ST    Q

ST Language Example

Q := LIMIT (IMIN, IN, IMAX);

See Also

• max
• min
• mod / modLR / modR
• odd