Siemens SIMATIC S7 System Manual page 149

Range
You then configure either the voltage range or the current range for the channel. You can
choose one of the following value ranges:
● +/- 2.5v
● +/- 5v
● +/- 10v
● 0 - 20ma
Rejection
Fluctuations in analog input values can also be caused by the response time of the sensor,
or the length and condition of the wires carrying the analog signal to the module. In such
cases, the fluctuating values could be changing too rapidly for the program logic to respond
effectively. You can configure the module to reject signals to eliminate or minimize noise at
the following frequencies:
● 10 Hz
● 50 Hz
● 60 Hz
● 400 Hz
Smoothing
You can also configure the module to smooth the analog input signal over a configured
number of cycles, thus presenting an averaged value to the program logic. You have four
choices for the smoothing algorithm:
● None (no smoothing)
● Weak
● Medium
● Strong
S7-200 SMART
System Manual, V2.3, 07/2017, A5E03822230-AF
6.1 Configuring the operation of the PLC system
PLC device configuration
149