SHL_RBIT_***: Left shift on an integer or double integer

Function description

The function SHL_RBIT_*** performs a shift to the left for an integer or a double integer, with recovery of the moved bits.

The additional parameters and can be configured.

Available functions

List of available functions:

Representation in FBD

Representation applied to an integer:

Representation in LD

Representation applied to an integer:

Representation in IL

Representation applied to an integer:

LD Input_Var

SHL_RBIT_INT Shift_Num, Shifted_Var, Shifted_Bits

Representation in ST

Representation applied to an integer:

SHL_RBIT_INT(Input_Var, Shift_Num, Shifted_Var, Shifted_Bits);

Description of the parameters

The following table describes the input parameters:

Parameter	Type	Comment
Input_Var	INT, DINT	Variable on which the shift is to be performed. Example: Input_Var = 2#0001111101101000.
Shift_Num	INT	Value of the shift to be performed. Example: Shift_Num = 4.

The following table describes the output parameters:

Parameter	Type	Comment
Shifted_Var	INT, DINT	Shifted_Var contains the value of Input_Var shifted by the number of bits given by Shift_Num. The shift register is filled with zeros. Example: with the data examples of the previous table, the result is the following Shifted_Var = 2#1111011010000000
Shifted_Bits	INT, DINT	Shifted_Bits contains the shifted bits. Example: with the example values of the previous table, the result is the following Shifted_Bits = 2#0000000000000001

EN stands for ENable; it is an optional block input. When the EN input is enabled, an ENO output is set automatically.

If EN = 0, the block is not enabled; its internal program is not executed, and ENO is set to 0.

If EN = 1, the block's internal program is run and ENO is set to 1. If an error occurs, ENO is set to 0.

If the EN input is not connected, it is set automatically to 1.

ENO

ENO stands for Error NOtification; this is the output associated with the optional input EN.

If ENO is set to 0 (because EN = 0 or in case of an execution error):

the status of the function block outputs remains the same as it was during the previous scanning cycle that executed correctly;
the output(s) of the function, as well as the procedures, are set to "0".