KRL Variable Assigned to an attribute in a STRUC

    I'm having an issue creating an array of STRUC's I'd like to loop through and perform the same operation on.

    Right now, I have a STRUC and a value using that type.

    Code
    GLOBAL STRUC PARAM_TYP REAL current, past, CHAR name[25]
DECL GLOBAL PARAM_TYP _paramArray[100]
_paramArray[1] = {current 2.0, past 2.0, name[] "_offsetE1"}
_paramArray[2] = {current _offsetE1, past 2.0, name[] "_offsetE1"}

    Param 1 works but param 2 shows the error "INTEGER, REAL or CHARACTER constant expected"

    Am I to understand that you cannot assign values in STRUC's by reference to another variable?

    • Best Answer

    Correct. You can't have more than one layer of abstraction, so to speak. No "indirect addressing," to put it another way. Each member of a STRUC must be set to a literal value, not "pointed" to another variable.

    So, in your .DAT file array, you would need to assign some literal initial value. Then, in your executable code, assign by:

    _ParamArray[2].current = _offsetE1

    Quote from jonathan.davis

    But there'd be no way to keep it up to date with whatever value that _offsetE1 gets adjusted to would there be without explicitly running that code every time?

    Correct. You would need to run the executable "update code" periodically, or as an event-driven action. Depending on your specific needs. There's no way to "link" the two variables together dynamically, aside from adding the update code to an SPS background task.

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