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IMMEDIATEOUTPUT |
  
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IMMEDIATEOUTPUT |
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Block that performs an instantaneous reading of the selected output port, without changing the value of images (GLOBAL_IO variables).
Ladder Representation
Block Structure
Variable Type |
Name |
Data Type |
Description |
VAR_INPUT |
EN |
BOOL |
Block enabling |
Source |
WORD INT UINT |
Variable mapped with the values to be sent to the selected outputs |
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VAR_OUTPUT |
ENO |
BOOL |
Output enabling |
Destination# |
BYTE |
Outputs to be written (digital or analog) |
Operation
When this block has a TRUE value in EN, it writes immediately in the selected output the value of Source. If selected analog output AO1, the Source value is passed on to it. If the digital outputs are selected, DO1 will receive the zero bit of Source, DO2 bit one, DO3 bit two, and so on.
When EN has FALSE value, Destination# remains unchanged.
The ENO value forwards to the next Ladder block the EN value after the operation is completed.
Compatibility
Device |
Version |
PLC300 |
1.20 or higher |
SCA06 |
2.00 or higher |
Block Flowchart
Example in Ladder
The above example is for immediate SOURCE written value, interpreted as a binary sequence, the digital outputs DO1 to DO9 of the PLC300 and DO1 receives the value of the least significant bit. The block ends with success, ENO output is activated. Note that the immediate writing does not prevail over direct coil DO1 or over enabling coils in DO2, DO3 and DO4.
Example in ST
The example below displays the instructions for applying the example above in the ST language.
VAR SOURCE : WORD := 0; END_VAR
DO1 := FB_IMMEDIATEOUTPUT( EN:=DI1, Source:=SOURCE, Destination:=0);
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