Read value

When calling the function block, the variable value is read at the offset specified and deployed to the output that corresponds to the specified data type code. For further processing, the index of the output is indicated by the current value at output "ValIdx". A ValIdx –1 indicates that no output could be assigned. ValIdx = 0 indicates a bit value, ValIdx = 1 indicates a byte value etc.


Name I/O Type(s) Function
DTypeC I UCHAR Data type code
IOffset I WORD Output Offset
BitVal O BIT Bit - value
ByteVal O UCHAR Word - value
WVal O WORD Word - value
LVal O LONG Long - value
LLVal O LONGLONG Long Int - value
FVal O FLOAT Float - value
DVal O DOUBLE Double - value
ValIdx O WORD Corresponding output


This function block is intended to be used as list element, f.e. with the function blocks "list of module variables" or "List of System Variables".