dynamic Array indexing

One more thing I would like to know how to do it:
I would like to SET dynamicly bit inside DB array depending theinteger  value inside MW100

so :

if MW100 = 5, DB65,DBX20.3 = true

if MW100 = 4, DB64,DBX20.3 = true

if MW100 = 3, DB63,DBX20.3 = true

....

Is it possible to loop this in STL

You need to understand how indirect addressing is done.
Please make an effort and search the Step7's internal program documentation on the subject.

You can also give this page a read.. [LINK]
w

hdhosseini

SOble

Yes I'm using step 7 and s7-300 plc

I know there is something about pointers but still dont know how to implement that in this case.
How to loop this array with pointers, and how to SET specific bit in array on the index choiced by HMI

You work should be roughly like this:
OPN DB 3
/////////////////////////////////
//Checks
L MW 100
L 7
>I
// JC aus1
/////////////////////////////////
//pointer
L MW 100
L P#DBX 0.0
OD
LAR1
SET
= [AR1,P#0.0]

//rest of codes

aus1: NOP 0


For pointer in STL with loops check (THIS).

 IS it possible to have P#DBX 0.0 as input parameter in function,so sometimes it is

P#DBX 0.0or P#DBX 30.0 or P#DBX 52.1 and so on

If it is which data type should be my input variable?