Siemens S7-1200 Operating Instructions Manual page 82

Configuration and operation
4.15 STEP 7 configuration of individual parameters
Smoothing factor
Analog values that fluctuate quickly can be evened out using the smoothing function.
The smoothing factors are calculated according to the following formula as with S7 analog
input modules.
where
y = smoothed value in the current cycle
n
x = value acquired in the current cycle n
n
k = smoothing factor
The following values can be configured for the module as the smoothing factor.
● 1 = No smoothing
● 4 = Weak smoothing
● 32 = Medium smoothing
● 64 = Strong smoothing
The smoothing factor cannot be configured at the same time as mean value generation.
Fault suppression time
An analog value in the overflow range (32767 / 7FFF
is not transferred for the duration of the fault suppression time. This also applies to live zero
inputs. The value in the overflow/underflow range is only sent after the fault suppression time
has elapsed, if it is still pending.
If the value returns to the measuring range before the fault suppression time elapses, the
current value is transferred immediately.
A typical use case for this parameter is the suppression of peak current values when starting
up powerful motors that would otherwise be signaled to the control center as a disruption.
The suppression is adjusted to analog values that are acquired by the S7 analog input
modules as raw values. These modules return the specified values for the overflow or
underflow range for all input ranges (also for live zero inputs).
The fault suppression time cannot be configured at the same time as mean value generation.
Recommendation for finished values that were preprocessed by the CPU:
If the CPU makes preprocessed finished values available in bit memory or in a data block,
suppression is only possible or useful if these finished values also adopt the values listed
above 32767 / 7FFF
case, the parameter should not be enabled for preprocessed values.
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or -32768 / 8000 in the overflow or underflow range. If this is not the
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) or underflow range (-32768 / 8000
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Operating Instructions, 01/2015, C79000-G8976-C381-01
)
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CP 1243-7 LTE