Error on migration from S5-115U to S7-300

Hi everybody,

I'm working on a migration from S5-115U to S7-300. The migrator showed an error in the next part of the S5 code:

M003   :B MW 208

M004   :SPA =M004

           :SPA =M005

           :SPA =M006

           :SPA =M007

           :SPA =M008

M005: .........

And in the source file created after the migration:

M008: NOP   0

      NOP   0                           //  B MW 208;

//  SPA  M009

// *** Advertencia en línea    5340   Instrucción de salto no convertible tras operación 'B' (usar SPL).

      SPA   M010

      SPA   M011

      SPA   M012

      SPA   M013

M010: NOP   0

I attach a screenshot of the S5 code.

Another problem is that I didn't find any manual about how the pointers work in S5. Please can you provide me any manual about that?  

I will be thankful if someone help me with my problem.

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Split from converting S5->S7, DO command.

jherson andrade

Hi everybody,

I'm working on a migration from S5-115U to S7-300. The migrator showed an error in the next part of the S5 code:

M003   :B MW 208

M004   :SPA =M004

           :SPA =M005

           :SPA =M006

           :SPA =M007

           :SPA =M008

M005: .........

And in the source file created after the migration:

M008: NOP   0

      NOP   0                           //  B MW 208;

//  SPA  M009

// *** Advertencia en línea    5340   Instrucción de salto no convertible tras operación 'B' (usar SPL).

      SPA   M010

      SPA   M011

      SPA   M012

      SPA   M013

M010: NOP   0

I read that B MW... instruction works like a pointer in S5. However, in this case it seems to work like the jump instruction SPL. Please can you tell me how exactly the B MW208 instruction works?

I attach a screenshot of the S5 code.

Another problem is that I didn't find any manual about how the pointers work in S5. Please can you provide me any manual about that?  

I will be thankful if someone help me with my problem.

 

----------------------------------------------------------------------------------------------------
Split from converting S5->S7, DO command.

Hello

Have you already seen this perhaps might help you:

What is the B instruction ??? - Siemens Industry Online Support ...

Hello,

Thanks for your piece of advise. It's a useful information. In my code the instruction  B MW 208 (S5) seems to work like a  SPL(S7). My problem is that I know how to use the SPL instruction, but I'm not sure how B MW208 is working.

I think in this case B instruction doesn't work like a pointer. Thanks in advance for your help