GET_BYTE_REF block
Short summary
Name |
GET_BYTE_REF |
→POU type |
|
Category |
|
Conform to →IEC-standard |
not defined in IEC-standard |
Graphical interface |
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Available since |
|
Functionality
The block returns a →reference to the first byte of the element connected to input IN.
Inputs, outputs, return value
|
Identifier |
Description |
|
In-outs |
IN |
REAL, LREAL, USINT, UINT, UDINT, ULINT, SINT, INT, DINT, LINT, TIME, BOOL, BYTE, WORD, DWORD, LWORD, STRING, CHAR, DATE_AND_TIME, DATE, TIME_OF_DAY or a →user-defined data type |
input value |
Return value: |
– |
REF_TO BYTE |
reference to the first byte of the input value |
Input EN and output ENO are available when →calling the block. See "Execution control: EN, ENO" for information on input EN and output ENO.
See:
"Blocks for safe logic" whether this block is supported for developing safety-relevant applications.
"Highlighting safe logic in the FBD-editor" for the effects when using the block as a block for safe logic .
Example for usage within ST-editor
FUNCTION_BLOCK ExampleGetByteRef
VAR
result : REF_TO BYTE;
arrayVar : ARRAY [1..10] OF UINT := [10(16#BEEF)];
END_VAR
result := GET_BYTE_REF(IN := arrayVar); /* 'result' contains the reference to the first byte of 'arrayVar' */
ENO := result^ = 16#EF;
END_FUNCTION_BLOCK
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.