Siemens 2AO U HF Manual - Page 17

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Voltage output ranges: 1 to 5 V
Table 4-4
SIMATIC S7 format: Output ranges 1 to 5 V
Output range
1 to 5 V
0
5,7000
:
5,0002
5,0000
:
1,0000
0,9998
:
0
0
4.4

Effect on analog value representation

4.4.1

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

The output values of the analog modules are dependent on the supply voltage for
electronics/encoders 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 of the DP master)
POWER ON RUN
POWER ON STOP
POWER OF
F
2AO U HF analog electronic module (6ES7135-4LB02-0AB0)
Manual, 04/2007, A5E01076940-01
Decimal
> 32511
32511
:
27649
27648
:
0
-1
:
-6912
< -6913
Relationship between the analog output values for the operating state of the PLC (CPU
of the DP master) and the supply voltage L+.
Supply voltage L+ on ET 200S
L+ present
L+ missing
L+ present
L+ missing
-
L+ present
L+ missing
4.4 Effect on analog value representation
Units
Hexadecimal
> 7EFF
H
7EFF
H
:
6C01
H
6C00
H
:
0
H
FFFF
H
:
E500
H
< E4FF
H
(power module)
Analog value representation
Range
Overflow
Overshoot range
Nominal range
Underrange
Underflow
Output value of the electronic
module with analog outputs
PLC values
Until first value output:
After startup, a signal of 0 mA or
•
0 V is output.
Dependent on the parameter
•
"CPU/master STOP"
-
Dependent on the parameter
"CPU/master STOP"
-
Dependent on the parameter
"CPU/master STOP"
-
17