Hi forum,

Have you ever used DO Instruction in STL Language for Siemens S5.

I have a bit confused about it.

Please help me to explain the below program if possible:

 :C DB 192
 :A D 18.15
 :A D 86.3
 :DO DW 18
 := Q 0.0

Thank you very much for your help.

Hello,

check here:

_{S5 DO Instruction}

Hi Scott,

Thank you for your quick help.

I just read the link but it said that depends on the CPU (944 may different with 941,..).

Now I am using CPU945, is it similar with CPU944?

Do you have any document make clear about this?

Thank you very much

Yes, that's the same.
See attachment, it is an excerpt from the manual.

You can download the complete manual here:

S5-115U Programmable Controller CPU 945-7UA1./-7UA2.

Hi Ixo,

Thank you very much.

It is much helpful.