Analog value representation
4.3 Measuring ranges
2AI I 4WIRE ST analog electronic module (6ES7134-4GB11-0AB0)
16 Manual, 04/2007, A5E01076100-01
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.
Measuring ranges for current: 4 to 20 mA
Table 4-3 SIMATIC S7 format: Measuring range 4 to 20 mA
Units
Measuring range
4 to 20 mA
Decimal Hexadecimal
Range
> 22,8142 32767 7FFF
H
Overflow
22,8142
:
20,0005
32511
:
27649
7EFF
H
:
6C01
H
Overshoot range
20,0000
16,0000
:
4,0000
27648
20736
:
0
6C00
H
5100
H
:
0
H
Nominal range
3,9995
.
1,1852
-1
:
-4864
FFFF
H
:
ED00
H
Underrange
< 1,1852 -32768 8000
H
Underflow
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