Logic, a loop for an array with type variables

[genakust]

Hello,

I have a type BatteryInRack:
Voltage: real;
Ready: bool;

and a type BatteryRack:
Battery1: BatteryInRack
Battery2: BatteryInRack
Battery3: BatteryInRack
_^...

I have in Logic a variable:
BatteryRack: BatteryRack

I try to assign a value to the Voltage value, for example:

for i:= 1 to 3 doBatteryRack[i]:= i;end_for;

But it isn't work.

Is there a way to assign the value in a Loop?

Thank you in advance.

[klemensn]

Hi genakust!

Which zenon version do you use?

The way you are trying to implement your battery rack will not work in logic for the following reasons:
1) You do not have an array of BatteryInRack-Variables within your BatteryRack-Structure => using indices won't work
2) Usually index variables are of Integer-based datatypes, so you might need a conversion if the index is used as value
4) Most crucial point: you are trying to assign an Integer-value to a variable of type BatteryInRack => Will never work: how should the BatteryInRack-variablle know which of its sub-variables to take for the value assignment?

I suggest you to modify your project the following way:
1) Replace the single BatteryInRack-variables within BatteryRack-type by a variable array (e.g. Batteries) so you can use the index
2) Rename the BatteryRack-variable to something like MyBatteryRack to avoid name collisions with the same-named datatype
3) Use the length of the array within for-condition, then you are more flexible: for i:=0 to COUNTOF(MyBatteryRack.Batteries)-1 do
4) Target the voltage of the BatteryInRack-variables by BatteryRack.[i].Voltage, e.g. BatteryRack.Batteries[i].Voltage
5) Add an ANY_TO_REAL()- conversion to the value assignment for the voltage, e.g.: BatteryRack.Batteries[i].Voltage = ANY_TO_REAL(i);

I tried it with version 7.60 and it worked in this case.
You find screenshots of the adaptions I made attached.



Hope this helps

BR, klemensn