Siemens SIMATIC S7-1200

PLC concepts
5.4 Data types
S7-1200 Programmable controller
126 System Manual, V4.2, 09/2016, A5E02486680-AK
Although not available as data types, the following BCD numeric format is supported by the
conversion instructions:
Table 5- 28 Size and range of the BCD format
Format
Size (bits)
Numeric Range
Constant Entry Examples
BCD16
16
-999 to 999
123, -123
BCD32 32 -9999999 to 9999999 1234567, -1234567
5.4.1
Bool, Byte, Word, and DWord data types
Table 5- 29 Bit and bit sequence data types
Data
type
Bit
size
Number
type
Number
range
Constant
examples
Address
examples
Bool 1
Boolean
FALSE or TRUE
TRUE
I1.0
Q0.1
M50.7
DB1.DBX2.3
Tag_name
Binary 2#0 or 2#1 2#0
Unsigned integer
0 or 1
1
Octal
8#0 or 8#1
8#1
Hexadecimal
16#0 or 16#1
16#1
Byte 8
Binary
2#0 to 2#1111_1111
2#1000_1001
IB2
MB10
DB1.DBB4
Tag_name
Unsigned integer
0 to 255
15
Signed integer
-128 to 127
-63
Octal
8#0 to 8#377
8#17
Hexadecimal B#16#0 to B#16#FF, 16#0 to
16#FF
B#16#F, 16#F
Word 16
Binary
2#0 to 2#1111_1111_1111_1111
2#1101_0010_1001_0110
MW10
DB1.DBW2
Tag_name
Unsigned integer
0 to 65535
61680
Signed integer
-32768 to 32767
72
Octal
8#0 to 8#177_777
8#170_362
Hexadecimal W#16#0 to W#16#FFFF,
16#0 to 16#FFFF
W#16#F1C0, 16#A67B
DWord 32 Binary 2#0 to
2#1111_1111_1111_1111_1111
_1111_1111_1111
2#1101_0100_1111_1110
_1000_1100
MD10
DB1.DBD8
Tag_name
Unsigned integer* 0 to 4_294_967_295 15_793_935
Signed integer* -2_147_483_648 to
2_147_483_647
-400000
Octal 8#0 to 8#37_777_777_777 8#74_177_417
Hexadecimal DW#16#0000_0000 to
DW#16#FFFF_FFFF,
16#0000_0000 to
16#FFFF_FFFF
DW#16#20_F30A,
16#B_01F6
* The underscore "_" is a thousands separator to enhance readability for numbers greater than eight digits.