Siemens SIMATIC ET 200iS, Manual

Page: 257 / 434

Analog Electronics Modules
ET 200iS Distributed I/O Station
A5E00087831-02
14-43
14.3 Response of the Analog Modules during Operation and if Faults
Occur
Chapter Overview
This chapter describes the following:
•
The dependence of the analog input and output values on the power supply of
the electronics module and the operating states of the PLC.
•
The response of the analog electronics modules depending on the location of
the analog values in the relevant range.
•
The influence of errors on the analog inputs/outputs.
•
Use of the shield contact.
Influence of the Power Supply and the Operating State
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).
Table 14-72 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)
Supply Voltage L+
on ET 200iS (Power
Supply 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 POWE
R ON RUN L + present
7FFFH until first change after
startup or after assignment of
parameters for the module is
completed. Until first value output:
•
After startup, a signal of
0 mA is output.
•
Dependent on the
parameter "CPU/ master
STOP"
POWE
R ON STOP L + present Process value Dependent on the
parameter "CPU/ master
STOP"