Siemens Simantic ET 200S - Response of the Analog Modules During Operation and if Faults Occur; Influence of the Power Supply and the Operating Status on Analog Input and Output Values

Analog electronic modules
4.4 Response of the Analog Modules during Operation and if Faults Occur
ET 200S
4-24 Manual, Edition 10/2005, A5E00514527-01
4.4 4.4 Response of the Analog Modules during Operation and if Faults Occur
4.4.1 Influence of the power supply and the operating status on analog input and output
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). The table
below shows this dependency..
Table 4-27 Dependence of the Input and Output Values on the Operating State of the PLC (CPU of the DP Master) and
the Power Supply Voltage L+
Operating State of the PLC
(CPU of the DP Master)
Power supply L+ on
ET 200S (power
module)
Input Value of the Electronics Module
with Analog Inputs (Evaluation
Possible on the CPU of the DP
Master)
Output Value of the Electronics
Module with Analog Outputs
Process values PLC values L+ present
7FFF
H
until first conversion after
startup, or after assignment of
parameters for the module is
completed.
Until first value output:
• After startup, a signal of
0 mA or 0 V is output.
• Dependent on the
parameter "CPU/ master
STOP"
POWER ON RUN
L+ missing 7FFF
H
-
L+ present Process value Dependent on the parameter
"CPU/ master STOP"
POWER ON STOP
L+ missing 7FFF
H
-
L+ present - Dependent on the parameter
"CPU/ master STOP"
POWER OF
F
-
L+ missing - -