MBShift

 Function - Multi-byte shift / rotate.

Inputs

Input	Data Type	Range	Unit	Default	Description
Buffer	SINT / USINT				Array of bytes.
Pos	DINT				Base position in the array.
NbByte	DINT				Number of bytes to be shifted or rotated.
NbShift	DINT				Number of shifts or rotations.
ToRight	BOOL	FALSE, TRUE			TRUE for right. FALSE for left.
Rotate	BOOL	FALSE, TRUE			TRUE for rotate. FALSE for shift.
InBit	BOOL	FALSE, TRUE			Bit to be introduced in a shift.

Outputs

Output	Data Type	Range	Unit	Description
Q	BOOL	FALSE, TRUE		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.

FBD Language Example

FFLD Language Example

• In the FFLD Language, the input rung (EN) enables the operation.
• The rung output is the result (Q).
• The function is called only if EN is TRUE.

IL Language Example

Not available.

ST Language Example

Q := MBShift (Buffer, Pos, NbByte, NbShift, ToRight,
Rotate, InBit);