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DEMUX2 Demultiplexer |
  
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DEMUX2 Demultiplexer |
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Block that creates 32 new BOOL variables from the decomposition of a DWORD variable.
Ladder Representation
Block Structure
Variable Type |
Name |
Data Type |
Description |
VAR_INPUT |
EN |
BOOL |
Block enabling |
DWord |
DWORD UDINT DINT |
Input variable of 15 bits |
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VAR_OUTPUT |
ENO |
BOOL |
End of operation |
Bit0 – Bit31 |
BOOL |
Bit of the corresponding position of Word |
Operation
When this block has a TRUE value in EN, it decomposes the input variable in DWord 32 Boolean values stored in Bit0 to Bit31 variables. Bit0 corresponds to the LSB (least significant bit) and Bit15 corresponds to the MSB (most significant bit).
When EN has FALSE value, output variables remain unchanged.
The ENO value forwards to the next Ladder block the EN value after the operation is completed.
Block Flowchart
Example in Ladder
The example above decomposes the value of MYDWORD in Boolean values, which are stored in the output variables BIT0 to Bit31. The block ends successfully and the ENO output is activated
Example in ST
The example below displays the instructions for applying the example above in the ST language.
VAR ENTRADA : DWORD := 1456756758; ARRAY_BOOL : ARRAY[0..31] OF BOOL; END_VAR
DO1 := FB_DEMUX2( EN:=DI1, DWord0:=ENTRADA, Bit0=>ARRAY_BOOL[0], Bit1=>ARRAY_BOOL[1], Bit2=>ARRAY_BOOL[2], Bit3=>ARRAY_BOOL[3], Bit4=>ARRAY_BOOL[4], Bit5=>ARRAY_BOOL[5], Bit6=>ARRAY_BOOL[6], Bit7=>ARRAY_BOOL[7], Bit8=>ARRAY_BOOL[8], Bit9=>ARRAY_BOOL[9], Bit10=>ARRAY_BOOL[10], Bit11=>ARRAY_BOOL[11], Bit12=>ARRAY_BOOL[12], Bit13=>ARRAY_BOOL[13], Bit14=>ARRAY_BOOL[14], Bit15=>ARRAY_BOOL[15], Bit16=>ARRAY_BOOL[16], Bit17=>ARRAY_BOOL[17], Bit18=>ARRAY_BOOL[18], Bit19=>ARRAY_BOOL[19], Bit20=>ARRAY_BOOL[20], Bit21=>ARRAY_BOOL[21], Bit22=>ARRAY_BOOL[22], Bit23=>ARRAY_BOOL[23], Bit24=>ARRAY_BOOL[24], Bit25=>ARRAY_BOOL[25], Bit26=>ARRAY_BOOL[26], Bit27=>ARRAY_BOOL[27], Bit28=>ARRAY_BOOL[28], Bit29=>ARRAY_BOOL[29], Bit30=>ARRAY_BOOL[30], Bit31=>ARRAY_BOOL[31]);
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