Effect On Analog Value Representation; Effect Of The Supply Voltage And The Operating State On Analog Output Values - Siemens SIMATIC ET 200S Manual

Output ranges for current: 4 to 20 mA
Table 4-4 SIMATIC S7 format: Output range 4 to 20 mA
Output range
4 to 20 mA
0
22,8100
:
20,0005
20,0000
:
4,0000
3,9995
:
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
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
POWER ON
POWER ON
POWER OFF
2AO I ST analog electronic module (6ES7135-4GB01-0AB0)
Manual, 04/2007, A5E01076949-01
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+.
(CPU of the DP master)
RUN
STOP
-
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
Supply voltage Output value of the electronic module with analog
L+ on ET 200S
(power module)
L+ present 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"
L+ missing -
L+ present Dependent on the parameter "CPU/master
STOP"
L+ missing -
L+ present Dependent on the parameter "CPU/master
STOP"
L+ missing -
Analog value representation
Range
Overflow
Overshoot range
Nominal range
Underrange
Underflow
outputs
17