Measuring Ranges - Siemens SIMATIC ET 200S Manual

Analog value representation

4.3 Measuring ranges

Analog values
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 11, 12, 13, 14, and 15 bit resolutions + sign. Each analog value is
entered left aligned in the ACCU. The bits marked with "x" are set to "0".
Table 4-2 Analog values (SIMATIC S7 format)
Resolution in bits
11+S
12+S
13+S
14+S
15 + sign
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
contain only a comparison of the measuring ranges with the units.
Measuring ranges for current: 0 to 20 mA, 4 to 20 mA
Table 4-3 SIMATIC S7 format: Measuring ranges 0 to 20 mA, 4 to 20 mA
Measuring range
0 to 20 mA
> 23.5178
23.5178
:
20.0007
20.0000
15.0000
:
0.0000
Negative values are
not supported
20
Units
Decimal Hexadecimal
16 10
8 8
H
4 4
H
2 4
H
1 1
H
Measuring range
4 to 20 mA
> 22.8142
22.8142
:
20.0005
20.0000
16.0000
:
4.0000
3.9995
.
1.1852
< 1.1852
High byte
S 0 0 0 0 0 0 0
H
S 0 0 0 0 0 0 0
S 0 0 0 0 0 0 0
S 0 0 0 0 0 0 0
S 0 0 0 0 0 0 0
Units
Decimal
32767
32511
:
27649
27648
20736
:
0
-1
:
-4864
-32768
2AI I 2WIRE HS analog electronic module (6ES7134-4GB52-0AB0)
Analog value
Low byte
0 0 0 1 x x x x
0 0 0 0 1 x x x
0 0 0 0 0 1 x x
0 0 0 0 0 0 1 x
0 0 0 0 0 0 0 1
Hexadecimal
7FFF Overflow
H
7EFF
H
: Overrange
6C01
H
6C00
H
5100
H
: Nominal range
0
H
FFFF
H
: Underrange
ED00
H
8000 Underflow
H
Manual, 01/2008, A5E01001734-02
Range