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DWORD_TO_BYTES Convert Double Word to Bytes |
  
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DWORD_TO_BYTES Convert Double Word to Bytes |
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Block that performs the conversion of a 32 bits (DWORD) value into four 8 bits (4 BYTES) value.
Ladder Representation
Block Structure
Variable Type |
Name |
Data type |
Description |
VAR_INPUT |
EN |
BOOL |
Block enabling |
Value |
DWORD UDINT DINT |
Value in DWORD |
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VAR_OUTPUT |
ENO |
BOOL |
End of operation |
Result1 |
BYTE USINT SINT |
Value in BYTE (LSB) |
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Result2 |
BYTE USINT SINT |
Value in BYTE |
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Result3 |
BYTE USINT SINT |
Value in BYTE |
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Result4 |
BYTE USINT SINT |
Value in BYTE (MSB) |
Operation
When this block has a TRUE value in EN, it interprets the Value value as DWORD and converts it into four BYTE values (from Result1 to Result4, where Result 1 is LSB), storing in Result.
When EN has FALSE value, Result remains unchanged.
The ENO value forwards to the next Ladder block the EN value after the operation is completed.
Block Flowchart
Example in Ladder
The examples above perform the conversion of variable VALUE, in DWORD, into four BYTE value storing the final result in RESULT1, RESULT2, RESULT3 and RESULT4. The block ends with success and ENO output is activated.
Example in ST
The example below displays the instructions for applying the example above in the ST language.
VAR VALUE : DINT := 65536; RESULT1 : SINT; RESULT2 : SINT; RESULT3 : SINT; RESULT4 : SINT; END_VAR
DO1 := FB_DWORD_TO_BYTES( EN:=DI1, Value:=VALUE, Result1=>RESULT1, Result2=>RESULT2, Result3=>RESULT3, Result4=>RESULT4);
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