
Analog modules
5.20 Analog input module SM 431; AI 8 x 14 Bit (6ES7431-1KF10-0AB0)
S7-400 Automation System Module Data
Reference Manual, Edition 09/2009, A5E00850736-06
269
Measured value smoothing
You will find information that is generally applicable to the smoothing of analog values in the
respective section.
The following figure shows for the module the number of module cycles, in the case of a step
response, after which the smoothed analog value is applied to almost 100%, depending on
the smoothing setting. The figure applies to every change of signal at an analog input.
50
100
0
63
50 100
150
200
Signal variation in
percent
Step response for any analog input signal
Smoothing Low:
average:
high:
Module cycles
Figure 5-27 Step response of the SM 431; AI 8 x 14 Bit
See also
General information about parameter assignment (Page 216)
Conversion, cycle, settling and response time of analog modules (Page 212)
5.20.3 Measuring methods and measuring ranges of SM 431; AI 8 x 14 Bit
Measuring methods
You can set the measuring method at the input channels:
● Voltage measurement
● Current measurement
● Resistance measurement
● Temperature measurement
You specify the setting by means of the measuring range modules on the module and the
"Measuring type" parameter in STEP 7.
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