Pointers in ST task

[drei 0]

Hello, is it possible use pointer in a task programmed with st language? I tried to write this: <SYMBOL> DM_0 CHANNEL D0 0 DM_1 CHANNEL D1 0 </SYMBOL> <CODE> DM_0 := 10; DM_1 := @DM_0; </CODE> I was expecting that @DM_0 was a pointer to D10, but in DM_1 i found the value of DM_0. Any help? Thanks

[BobB 58]

I am no expert at ST but it appears that you have a space between D1 and 0. I suspect the space need s go and the number become D10.

[Guest anonymous]

Hello drei, This will not work, the @ symbol does not work in ST the same as it does in Ladder. What you will need to do is set D0 as an array, and use an INT variable (i.e. MyIndex) as your pointer. value. MyPointer := 10 ; E.g. DM_1 := DM_0[MyPointer]; This will set D1 to the value that is in D10

[drei 0]

It's exactly what i was looking for! Thank you very much Edited 19 Jun 2008 by drei

[scottmurphy 1]

I will also note, that the use of the [] brackets is common for addressing pointers in other platforms.