scl pointer to merker word

[Danny Van den Heuvel]

Hallo,

I've got a question
I want to know or calculate the real address pointer of a merker byte.

This example points to MB60, I don't know how they became it,
can anyone give me a explenation please.

View.PTR:=16#830001E0; //area pointer starting at MB60


Thanks...

 

[PeterW]

the manual here --> Manual. (Programming with STEP 7 V5.4 S7prv54_e.pdf)

You can download but it is already on your machine and can be seen when you are editing a block in Step 7 by selecting HELP/CONTENTS.

Go to Apendix section A3.4.2.

This explains in detail the pointer format and answers all your questions.

I point to this as it answers your question much better than I could.

 

[Danny Van den Heuvel]

Don't get it

I've been reading the manual like you said, and found the coding of the types.

b#16#83 M Bit memory area

but I can't get how they come out of 16#830001E0 pointing to MB60
1E0 = 480?

Is there some combination because 60 = 3C

Please any tips are welcome
bye the way thanks for the quick response anyway

 

[JesperMP]

A pointer points to a bit, not a byte.
So if you multiply 60 bytes with 8 bits/byte you get 8 x 60 = 480.
Simple, eh ?

 

[Danny Van den Heuvel]

Thanks Jesper

Hi Jesper,

I'll thank you a thousend times!!!!
So simple, why haven't I seen it

Greetings
Danny