Siemens ET 200S - Page 410

Analog Electronic Modules
12-54
Distributed I/O System ET 200S
EWA 4NEB 780 6024-02 07
Effect of the Supply Voltage and the Operating Mode
The input and output values of the analog modules are dependent on the supply
voltage for electronic components/sensors and on the operating mode of the PLC
(CPU of the DP master).
Table 12-68How the Analog Input/Output Values Depend on the Operating Mode of the PLC (CPU of the
DP Master) and the Supply Voltage L +
Operating Mode
of the PLC (CPU
of the DP Master)
Supply Vol-
tage L + to
ET 200S
(Power Mo-
dule)
Input Value of the Electronic
Module with Analog Inputs
(Evaluation Possible in the
CPU of
the DP Master)
Output Value of the Electro-
nic Module with Analog Out-
puts
Power RUN L + applied Process values PLC values
on
7FFF
H
until the first conversion
after switching on or after
parameterization of the module
Until the first value output:
 After switching on, a signal
of 0 mA or 0 V is output
 Dependent on the “Behavior
at CPU-Master-STOP”
parameter
L + not applied 7FFF
H
–
Power
on
STOP L + applied Process value Dependent on the “Behavior at
CPU-Master-STOP” parameter
L + not applied 7FFF
H
–
Power
off
– L + applied – Dependent on the “Behavior at
CPU-Master-STOP” parameter
L + not applied – –
Effect of the Value Range for the Analog Input
The behavior of the electronic modules with analog inputs depends on where the
input values are in the value range. The following table 12-69 illustrates this.