Siemens Simatic S7-400 - Manual (Page 300)

Analog Modules
5-84
S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Table 5-51 Parameters of the SM 431; AI 8 14 Bit, continued
Parameter Scope Parameter
Type
Default 1 Value Range
•
Interference
suppression 60 Hz; 50 Hz 50 Hz
Static Channel
•
Smoothing None
Low
Average
High None
Static Channel
•
Ref. junction None
RTD on Channel 0
Reference temperature value dynamic None
1 Only in the CC (central controller) is it possible to start up the analog modules with the default settings.
Smoothing of the Measured Values
You fill find information that is generally applicable to the smoothing of analog
values in Section 5.6.
The following figure indicates for the module in the case of a step response the
number of module cycles after which the smoothed analog value applies at 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
Smoothing: low:
average:
high:
Module cycles
Signal variation
in percent
Step response for any analog input signal
Figure 5-29 Step Response of the SM 431; AI 8 14 Bit