Siemens SIMATIC ET 200S - Effect on Analog Value Representation; Effect of the Supply Voltage and the Operating State on Analog Input Values

Analog value representation
4.3 Effect on analog value representation
2AI U HF analog electronic module (6ES7134-4LB02-0AB0)
Manual, 04/2007, A5E01076007-01
19
Voltage measuring ranges: 1 to 5 V
Table 4-4 SIMATIC S7 format: Measuring range 1 to 5 V
Units
Measuring range
1 to 5 V
Decimal Hexadecimal
Range
> 5,704 32767 7FFF
H
Overflow
5,704
:
5,000145
32511
:
27649
7EFF
H
:
6C01
H
Overshoot range
5,000
4,000
:
1,000
27648
20736
:
0
6C00
H
5100
H
:
0
H
Nominal range
0,999855
:
0,296
-1
:
-4864
FFFF
H
:
ED00
H
Underrange
< 0,296 -32768 8000
H
Underflow
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 Relationship between the analog input values for the operating state of the PLC (CPU of
the DP master) and the supply voltage L+
Operating state of the PLC (CPU
of the DP master)
Supply voltage L+ on
ET 200S (power
module)
Input value of the electronic module with
analog inputs (evaluation possible on
the CPU of the DP master)
Process values L+ present
7FFF
H
until first conversion after startup,
or after assignment of parameters for
the module is completed.
POWER ON RUN
L+ missing 7FFF
H
L+ present Process value POWER ON STOP
L+ missing 7FFF
H
L+ present - POWER OFF -
L+ missing -