Siemens S7 - Help me understand how this works.

[Rob...]

LAR1 P##Receive

L B#16#10 // Loading syntax ID
T LB [AR1,P#0.0] // Transfer to Any Pointer
L B#16#2 // Load data type byte
T LB [AR1,P#1.0] // Transfer to Any Pointer
L 32
T LW [AR1,P#2.0] //Load 32 bytes


L #db_nr //Source is the DB Nr 104
T LW [AR1,P#4.0]
L P#DBX 48.0
T LD [AR1,P#6.0] // Start Adress

I know what it is doing, it is creating P#DB104.DBX48.0 Byte 32. This is later used in an SFC14 block further on.

I just can't wrap my head around how it compiles the information together.

Never have used area pointers in this manner before.

 

[L D[AR2P#0.0]]

The format of the anypointer is shown below - does this clarify things?

 

[Rob...]

I found that literally minuets after posting.

It's just clicked how it all works. Thanks.

 

[L D[AR2P#0.0]]

FYI, where you specify a hard coded any pointer in a call (e.g. to sfc14), the actual code executed is the same as your original post, the editor simply shows you a sanitised block call.

 

[Rob...]

Thanks for the information, every day is a school day!