ROLw / ROL_INT / ROL_UINT / ROL_WORD

Function - Rotate bits of a register to the left.

Inputs

IN : INT 16 bit register
NBR : INT Number of rotations (each rotation is 1 bit)

Outputs

Q : INT Rotated register

Diagram

Remarks

In LD language, the input rung (EN) enables the operation, and the output rung keeps the state of the input rung. In IL language, the first input must be loaded before the function call. The second input is the operand of the function.

ST Language

Q := ROLw (IN, NBR);

FBD Language

LD Language

(* The rotation is executed only if EN is TRUE *)
(* ENO has the same value as EN *)

IL Language:

Op1: LD   IN
     ROLw NBR
     ST   Q