Siemens S7-1200 - Module replacement

PLC concepts
4.4 Data types
S7-1200 Programmable controller
System Manual, 03/2014, A5E02486680-AG
111
● Floating-point Real (Page 112): Real (32-bit Real or floating-point value), LReal (64-bit
Real or floating-point value)
● Time and Date (Page 113): Time (32-bit IEC time value), Date (16-bit date value), TOD
(32-bit time-of-day value), DTL (12-byte date-and-time structure)
● Character and String (Page 114): Char (8-bit single character), String (variable-length
string of up to 254 characters)
● Array (Page 116)
● Data structure (Page 117): Struct
● PLC Data type (Page 117)
● Pointers (Page 118): Pointer, Any, Variant
Although not available as data types, the following BCD numeric format is supported by the
conversion instructions.
Table 4- 25 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
4.4.1
Bool, Byte, Word, and DWord data types
Table 4- 26 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, 1,
I1.0
Q0.1
M50.7
DB1.DBX2.3
Tag_name
Binary
0 or 1
0, 2#0
Octal
8#0 or 8#1
8#1
Hexadecimal 16#0 or 16#1 16#1
Byte 8
Binary
2#0 to 2#11111111
2#00001111
IB2
MB10
DB1.DBB4
Tag_name
Unsigned integer
0 to 255
15
Octal
8#0 to 8#377
8#17
Hexadecimal
B#16#0 to B#16#FF
B#16#F, 16#F
Word 16
Binary
2#0 to 2#1111111111111111
2#1111000011110000
MW10
DB1.DBW2
Tag_name
Unsigned integer
0 to 65535
61680
Octal
8#0 to 8#177777
8#170360
Hexadecimal W#16#0 to W#16#FFFF,
16#0 to 16#FFFF
W#16#F0F0, 16#F0F0
DWord 32 Binary 2#0 to
2#111111111111111111111111
11111111
2#111100001111111100
001111
MD10
DB1.DBD8
Tag_name
Unsigned integer
0 to 4294967295
15793935