The document details various elementary data types including their sizes, formats, and ranges, such as boolean, byte, word, dword, integer, and real numbers. It also outlines the addressing method for storage areas like inputs, outputs, timers, counters, and memory, specifying how to reference them by byte and bit addresses. Examples illustrate how these types and addresses are applied in practical contexts.

1. 7. Data Types and Addressing
7.1 Data Types

6. Data Types Summary
Each elementary data type has a defined length. The following table lists the elementary
data types.
Summary
Type and
Description
Size
in
Bits
Format
Options
Range and Number
Notation (lowest to
highest value)_
Example
BOOL(Bit) 1 Boolean text TRUE/FALSE TRUE
BYTE
(Byte)
8 Hexadecimal
Binary
B#16#0 to B#16#FF
2#0 to 2#1111_1111
L B#16#10
L byte#16#10
L2#1011_1010
WORD
(Word)
16 Binary
number
Hexadecimal
number
BCD
Decimal
number
unsigned
2#0 to
2#1111_1111_1111_1111
W#16#0 to W#16#FFFF
C#0 to C#999
B#(0.0) to B#(255.255)
L 2#0001_0000_0000_0000
L W#16#1000
L word#16#1000
L C#998
L B#(10,20)
L byte#(10,20)
DWORD
(Double
word)
32 Binary
number
Hexadecimal
2#0 to
2#1111_1111_1111_1111
2#1000_0001_0001_1000_
1011_1011_0111_1111

7. number
Decimal
number
unsigned
1111_1111_1111_1111
DW#16#0000_0000 to
DW#16#FFFF_FFFF
B#(0,0,0,0) to
B#(255,255,255,255)
L DW#16#00A2_1234
L dword#16#00A2_1234
L B#(1, 14, 100, 120)
L byte#(1,14,100,120)
INT
(Integer)
16 Decimal
number
signed
-32768 to 32767 L 1
DINT
(Integer, 32
bits)
32 Decimal
number
signed
L#-2147483648 to
L#2147483647
L L#1
REAL
(Floating-
point
number)
32 IEEE
Floating-
point
number
Upper limit:
3.402823e+38
Lower limit: 1.175 495e-
38
L 1.234567e+13
S5TIME
(SIMATIC
time)
16 S7 time in
steps of
10 ms
(default)
S5T#0H_0M_0S_10MS to
S5T#2H_46M_30S_0MS
and
S5T#0H_0M_0S_0MS
L S5T#0H_1M_0S_0MS
L
S5TIME#0H_1H_1M_0S_
0MS
TIME
(IEC time)
32 IEC time in
steps of 1
ms, integer
signed
-
T#24D_20H_31M_23S_6
48MS to
T#24D_20H_31M_23S_6
47MS
L T#0D_1H_1M_0S_0MS
L
TIME#0D_1H_1M_0S_0M
S
DATE
(IEC date)
16 IEC date in
steps of 1
day
D#1990-1-1 to
D#2168-12-31
L D#1996-3-15
L DATE#1996-3-15
TIME_OF_D
AY (Time)
32 Time in
steps of 1 ms
TOD#0:0:0.0 to
TOD#23:59:59.999
L TOD#1:10:3.3
L
TIME_OF_DAY#1:10:3.3
CHAR
(Character)
8 ASCII
characters
'A','B' etc. L 'E'

8. 7.2 Addressing
Storage areas are Inputs, Outputs, Timers, Counters, Memory (Local Variables,
Global Variables) , Data Blocks Pointers.
- Inputs
I(x, y) ---------------------- x = Byte address, y = Bit address
Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7
IBx (Input Byte) ---------- Ex.: IB0 = I0.0, I0.1, …,I0.7
IWx (Input Word) -------- Ex.: IW0 = (IB0, IB1)
= (I0.0, I0.1, …,I0.7, I1.0, I1.1,…, I1.7)
IDx (Input DWord) ------ Ex.: ID0 = (IW0, IW2) = (IB0, IB1, IB2, IB3)
= (I0.0, I0.1,…,I0.7, I1.0, I1.1,…,I1.7, I2.0, I2.1, I2.7, I3.0, I3.1, I3.7)
___________________________________________
- Outputs
Q(x, y) ---------------------- x = Byte address, y = Bit address
Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7
QBx (Output Byte) ---------- Ex.: QB0 = Q0.0, Q0.1, …,Q0.7
QWx (Output Word) -------- Ex.: QW0 = (QB0, QB1)
= (Q0.0, Q0.1, …,Q0.7, Q1.0, Q1.1,…, Q1.7)
QDx (Output DWord) ------ Ex.: QD0 = (QW0, QW2) = (QB0, QB1, QB2, QB3)
=(Q0.0, Q0.1,…,Q0.7, Q1.0, Q1.1,…,Q1.7, Q2.0, Q2.1, Q2.7, Q3.0, Q3.1, Q3.7)
_____________________________________
- Memory (M = Markers or Global Memory, L = Local Memory)
M(x, y) ---------------------- x = Byte address, y = Bit address
Bytes 0, 1, 2, ..., 255 Bits 0, 1, 2, …, 7
MBx (Memory Byte) ---------- Ex.: MB0 = M0.0, M0.1, …,M0.7
MWx (Memory Word) -------- Ex.: MW0 = (MB0, MB1)
= (M0.0, M0.1, …,M0.7, M1.0, M1.1,…, M1.7)
MDx (Memory DWord) ----- Ex.: MD0 = (MW0, MW2)= (MB0, MB1, MB2, MB3)
=(M0.0, M0.1,…,M0.7, M1.0, M1.1,…,M1.7, M2.0, M2.1, M2.7, M3.0, M3.1, M3.7)

9. - Timers
T1, T2, T3, …, Tn (According to the available number of timers)
_____________________________________
- Counters
C1, C2, C3,…, Cn (According to the available number of counters)
_____________________________________
- Data Blocks