Siemens Simatic M7-400 Reference Manual page 300

Analog Modules
Table 5-51 Parameters of the SM 431; AI 8
Parameter
•
Interference 60 Hz; 50 Hz
suppression
•
Smoothing None
Low
Average
High
•
Ref. junction None
RTD on Channel 0
Reference temperature value dynamic
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.
Signal variation
in percent
Smoothing:
Figure 5-29
5-84
14 Bit, continued
Value Range
Step response for any analog input signal
100
63
50
0
50
low:
average:
high:
Step Response of the SM 431; AI 8
S7-400, M7-400 Programmable Controllers Module Specifications
1
Default Parameter
Type
50 Hz
Static
None
Static
None
150
100
Module cycles
14 Bit
Scope
Channel
Channel
200
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