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. - Multibyte shift / rotate
Inputs
Buffer : SINT/USINT Array of bytes
Pos : DINT Base position in the array
NbByte : DINT Number of bytes to be shifted/rotated
NbShift : DINT Number of shifts or rotations
ToRight : BOOL TRUE for right / FALSE for left
Rotate
: BOOL TRUE for rotate / FALSE for shift
InBit :
BOOL Bit to be introduced in a shift
Outputs
Q : BOOL TRUE if successful
Remarks
Use the "ToRight" argument to specify a shift to the left (FALSE) or to the right (TRUE). Use the "Rotate" argument to specify either a shift (FALSE) or a rotation (TRUE). In case of a shift, the "InBit" argument specifies the value of the bit that replaces the last shifted bit.
In FFLD language, the rung input (EN) validates the operation. The rung output is the result ("Q").
ST Language
Q := MBShift (Buffer, Pos, NbByte, NbShift, ToRight, Rotate, InBit);
FBD Language
FFLD Language
(* the function is called only if EN is TRUE *)
IL Language:
Not available
