ROL block
Short summary
Name |
ROL |
→POU type |
|
Category |
|
Conform to →IEC-standard |
currently restricted
|
Graphical interface |
|
Available since |
version 1.18.0 (for logi.CAD 3) |
Functionality
The block returns the result of a bitwise rotation to the left (circular) .
At input IN, enter the value to be rotated. At input N, enter the bits to left-rotate the value. The bits cleared on the one side are filled in on the other side.
Inputs, return value
|
Identifier |
Description |
|
Inputs: |
IN |
BOOL, BYTE, WORD, DWORD or LWORD(corresponds to →generic data type ANY_BIT) |
input value |
N |
INT |
number of bits to rotate |
|
Return value: |
– |
BOOL, BYTE, WORD, DWORD or LWORD(corresponds to →generic data type ANY_BIT) |
|
Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.
Example for usage within ST-editor
PROGRAM Test
VAR
result1 : BYTE;
result2 : WORD;
END_VAR
result1 := ROL(IN := BYTE#
16
#
42
, N :=
2
); (* The variable
'result1'
evaluates to
'16#09'
(decimal:
9
). *)
result2 := ROL(IN := WORD#
16
#
42
, N :=
2
); (* The variable
'result2'
evaluates to
'16#0108'
(decimal:
264
). *)
END_PROGRAM
When creating your application within the ST-editor, enter a call of a block by typing the text as requested by the syntax or use Content Assist.