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DWORD_TO_WORD |
  
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DWORD_TO_WORD |
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Block that performs the conversion of a DWORD value into a WORD 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 |
Result |
WORD UINT INT |
Value in WORD |
Operation
When this block has a TRUE value in EN, it interprets the Value value as DWORD and converts it into WORD, 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 convert the VALUE variable, in DWORD, into a WORD value storing the final result in RESULT. The block ends with success and ENO output is activated. Notice that only the sixteen least significant bits are taken into account.
Example in ST
The example below displays the instructions for applying the example above in the ST language.
VAR VALUE : DINT := 30654; RESULT : INT; END_VAR
RESULT := FB_DWORD_TO_WORD(EN:=DI1, Value:=VALUE, ENO=>DO1);
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