SCL programming in S7-1200

I had a problem while trying to write a program in SCL for S7-1200 (I'm using CPU 1212C DC/DC/DC FW version 2.2).

While some instructions can be performed without issues, there are others I can't add. For instance, if I try to add instruction POKE, or PEEK (or any of their variants POKE_WORD, PEEK_BOOL, etc.) just as it appears on STEP7 Professional V11 SP2 manual (page 2465), I find that it turns red and shows the message "tag not found" (attached goes the image of this problem).

I found out that there are a number of instructions I can't add, and all of them appear with a white icon on the instructions tab. I couldn't find any information on the manual about instructions that can't be performed on certain CPUs, and I tried on CPU 1214C and it does the same thing. Does anybody now how can I do to add any of this instructions?

Thanks

Here's the exact code

[code]//
// Peek inside DB with #DBNumber @ offset=ByteOffset
//
#Tag_Area := 16#84;
IF #Tag_Area <> 16#84 THEN
#DBNumber := 0;
END_IF;

#Results := PEEK_WORD(area:=#Tag_Area,
dbNumber:=#DBNumber,
byteOffset:=#in_ByteOffset);

#out_Results := #Results;[/code]

Onur_Semih

Hi huggy_d1 ;

PEEK_WORD instruction returns the result as a #in_ByteOffset value.Is this a result of a constant value oraddress information is transferred to the#Results ?

Is this a pointer that contains the address information or only stores a constant value?(for#Results ?)

Thanks for yout help.

Best Regards..