Hi,

I need information about Machine Code for the AWL Instructions for Simatic S7.

Thanks

 

Hello,

I don't know if I exactly understand what you mean when asking for machine code. If you simply want some detailed information about the awl instructions, then just follow this link:

http://support.automation.siemens.c...653995&siteid=cseus&query=awl&page=1&view=new

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On the official SIEMENS Website you can get hundreds of different manuals in different languages. STL (Statement List) is the english synonym for AWL (Anweisungsliste).

Hope this helps,
Marco

 

Hi,

I try to find the opcode (byte code) representation of the AWL instructions.

For example the instruction

L MB 1

may be represent in the PLC memory like

0x1A 0x01

In the S5 documentation you can check that, but the S7 information is missing.

Thanks

 

I don't think that information is available for the S7. It might not even be a meaningful question for the S7, as they may not necessarily use a common byte code format across all their models.

With the S5 PLCs the byte code format was well defined and changes were rare. This is why you could use the same programming software for years without having compatibility problems. I don't think they did this with the S7, which would be why the programming software has so many compatibility problems and you have to keep updating it.