Siemens SIMATIC ET 200S Manuel de l'utilisateur - Page 19

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Siemens SIMATIC ET 200S Manuel de l'utilisateur
Voltage measuring ranges: 1 to 5 V
Table 4-4
SIMATIC S7 format: Measuring range 1 to 5 V
Measuring range
1 to 5 V
> 5,704
5,704
:
5,000145
5,000
4,000
:
1,000
0,999855
:
0,296
< 0,296
4.3

Effect on analog value representation

4.3.1

Effect of the supply voltage and the operating state on analog input values

The input and output values of the analog modules are dependent on the power supply for
electronics/sensors and on the operating state of the PLC (CPU of the DP master). This is
illustrated by the table below.
Table 4-5
Operating state of the PLC (CPU
POWER ON
POWER ON
POWER OFF
2AI U HF analog electronic module (6ES7134-4LB02-0AB0)
Manual, 04/2007, A5E01076007-01
Decimal
32767
32511
:
27649
27648
20736
:
0
-1
:
-4864
-32768
Relationship between the analog input values for the operating state of the PLC (CPU of
the DP master) and the supply voltage L+
of the DP master)
RUN
STOP
-
4.3 Effect on analog value representation
Units
Hexadecimal
7FFF
H
7EFF
H
:
6C01
H
6C00
H
5100
H
:
0
H
FFFF
H
:
ED00
H
8000
H
Supply voltage L+ on
ET 200S (power
module)
L+ present
L+ missing
L+ present
L+ missing
L+ present
L+ missing
Analog value representation
Range
Overflow
Overshoot range
Nominal range
Underrange
Underflow
Input value of the electronic module with
analog inputs (evaluation possible on
the CPU of the DP master)
Process values
7FFF
until first conversion after startup,
H
or after assignment of parameters for
the module is completed.
7FFF
H
Process value
7FFF
H
-
-
19