Analog value representation
4.3 Measuring ranges
2AI U ST analog electronic module (6ES7134-4FB01-0AB0)
16
Manual, 04/2007, A5E01076000-01
Output value
The following table shows the representation of the binary analog values and the
corresponding decimal and hexadecimal representation of the units of the analog values.
The table below shows the resolutions 11, 12, 13, and 15 bit + sign. Each analog value is
entered left aligned in the ACCU. The bits marked with "x" are set to "0".
Table 4-2
Output values (SIMATIC S7 format)
Units
Analog value
Resolution in bits
Decimal
Hexadecimal
High byte
Low byte
11+S
16
10
H
S 0 0 0 0 0 0 0
0 0 1 x x x x
12+S
8
8
H
S 0 0 0 0 0 0 0
0 0 0 1 x x x
13+S
4
4
H
S 0 0 0 0 0 0 0
0 0 0 0 1 x x
15 + sign
1
1
H
S 0 0 0 0 0 0 0
0 0 0 0 0 0 1
4.3
Measuring ranges
Introduction
The following tables contain the digitized analog values for the measuring ranges of the
analog input modules.
Since the binary representation of the analog values is always the same, these tables only
compare the measuring ranges with the units.
Voltage measuring ranges: ±5 V , ±10 V
Table 4-3
SIMATIC S7 format: Measuring ranges ±5 V and ±10 V
Units
Measuring range ±5 V
Measuring range
±10 V
Decimal
Hexadecimal
Range
> 5,8794
> 11,7589
32767
7FFF
H
Overflow
5,8794
:
5,0002
11,7589
:
10,0004
32511
:
27649
7EFF
H
:
6C01
H
Overshoot range
5,00
3,75
:
-3,75
-5,00
10,00
7,50
:
-7,50
-10,00
27648
20736
:
-20736
-27648
6C00
H
5100
H
:
AF00
H
9400
H
Nominal range
-5,0002
:
-5,8796
-10,0004
:
-11,759
-27649
:
-32512
93FF
H
:
8100
H
Underrange
< -5,8796
< -11,759
-32768
8000
H
Underflow
