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ILOAD |
  
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ILOAD |
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Block which indirectly loads the value of a variable and transfers it to Value.
Ladder Representation
Block Structure
Variable Type |
Name |
Data Type |
Description |
VAR_INPUT |
EN |
BOOL |
Block enabling |
Group# |
BYTE |
Group where the variable is stored |
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DataType# |
BYTE |
Data type of the selected variable |
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Address |
DWORD UDINT DINT |
Address of the global variable, as its group |
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VAR_OUTPUT |
ENO |
BOOL |
End of operation |
Value |
As selected inDataType# |
Value of the selected variable |
Operation
When this block has a TRUE value in EN, it loads, in Value, the of the Address variable belonging to the Group# group, as the selected DataType#.
When EN has FALSE value, Value 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 above example loads the value of the address 40 of group 2 (GLOBAL_SYSTEM%S), which represents the status of ESC key in UINT format for the VALUE variable. 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 ADDRESS : DINT := 40; VALUE : UINT; END_VAR
VALUE := FB_ILOAD( EN:=DI1, Group:=2, DataType:=6, Address:=ADDRESS, ENO=>DO1);
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