MBshift

 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. - 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	TRUE, FALSE			TRUE for right. FALSE for left.
Rotate	BOOL	TRUE, FALSE			TRUE for rotate. FALSE for shift.
InBit	BOOL	TRUE, FALSE			Bit to be introduced in a shift.

Outputs

Output	Data Type	Range	Unit	Description
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.

FBD Language

FFLD Language

• 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

Not available.

ST Language

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