Siemens SIMATIC S7-1200 - Page 207

Programming concepts
7.5 Programming language
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
207
POKE(area:=_in_,
dbNumber:=_in_,
byteOffset:=_in_,
value:=_in_);
Writes the value (Byte, Word, or DW
ord) to
the referenced byteOffset of the referenced
data block, I/O or memory area
Example referencing data block:
POKE(area:=16#84, dbNumber:=2,
byteOffset:=3, value:="Tag_1");
Example referencing QB3 output:
POKE(area:=16#82, dbNumber:=0,
byteOffset:=3, value:="Tag_1");
POKE_BOOL(area:=_in_,
dbNumber:=_in_,
byteOffset:=_in_,
bitOffset:=_in_,
value:=_in_);
Writes the Boolean value to the referenced
bitOffset and byteOffset of the referenced
data block, I/O or memory
area
Example:
POKE_BOOL(area:=16#84, dbNumber:=2,
byteOffset:=3, bitOffset:=5, va
l-
ue:=0);
POKE_BLK(area_src:=_in_,
dbNumber_src:=_in_,
byteOffset_src:=_in_,
area_dest:=_in_,
dbNumber_dest:=_in_,
byteOffset_dest:=_in_,
count:=_in_);
Writes "count" number of bytes starting at the
referenced byte Offset of the referenced
source data block, I/O or memory area to the
referenced byteOffset of the referenced dest
i-
nation data block, I/O or memory area
Ex
ample:
POKE_BLK(area_src:=16#84,
dbNumber_src:=#src_db, byteOf
f-
set_src:=#src_byte, area_dest:=16#84,
dbNumber_dest:=#src_db, byteOf
f-
set_dest:=#src_byte, count:=10);
For PEEK and POKE instructions, the following values for the "area", "area_src" and
"area_dest" parameters are applicable. For areas other than data blocks, the dbNumber
parameter must be 0.
16#81 I
16#82
Q
16#83
M
16#84
DB