11-7
ET 200L, ET 200L-SC and ET 200L-SC IM-SC Distributed I/O Device
EWA 4NEB 780 6009-02c
11.4
Behavior of the Analog Input Modules
This section describes:
The dependency of analog input values on the load power supply of the
analog modules and the operating states of the CPU
The behavior of the analog modules depending on the position of the ana-
log values in each value range
The effect of faults on the analog modules
The behavior of the analog input modules depends on which part of the value
range the input values are in.
Table 11-2
Effect of the Operating Mode of the CPU and the Supply Voltage L+ on the Analog Input Values
Operating Mode of the CPU
Supply Voltage L+
at the Analog
Input Value of the Analog Module
at the Analog
Module
S7 Number Format
S5 Number Format
POWER ON
RUN
L+ applied
Process value
Process value
pp
7FFF
H
until the conclusion
of the 1st conversion after
the parameterization of the
module.
7FFF
H
until the conclusion
of the 1st conversion after
the parameterization of the
module.
L+ not applied
7FFF
H
7FFF
H
POWER ON
STOP
L+ applied
Process value
Process value
pp
7FFF
H
until the conclusion
of the 1st conversion after
the parameterization of the
module.
7FFF
H
until the conclusion
of the 1st conversion after
the parameterization of the
module.
L+ not applied
7FFF
H
7FFF
H
POWER OFF
–
L+ applied
–
–
L+ not applied
–
–
Introduction
Extreme Range of
the Analog Signals
SC Analog Electronic Modules – Parameters