ABB REF615 L - Binary input filter time

3.9 Binary input
3.9.1 Binary input filter time
The filter time eliminates debounces and short disturbances on a binary input. The
filter time is set for each binary input of the IED.
1 2
3
4
5 5
GUID-13DA5833-D263-4E23-B666-CF38B1011A4B V1 EN
Figure 16: Binary input filtering
1
t
0
2 t
1
3 Input signal
4 Filtered input signal
5 Filter time
At the beginning, the input signal is at the high state, the short low state is filtered
and no input state change is detected. The low state starting from the time t
0
exceeds the filter time, which means that the change in the input state is detected
and the time tag attached to the input change is t
0
. The high state starting from t
1
is
detected and the time tag t
1
is attached.
Each binary input has a filter time parameter Input # filter, where # is the number
of the binary input of the module in question (for example Input 1 filter).
Table 47: Input filter parameter values
Parameter
Values Default
Input # filter time 5...1000 ms 5 ms
Section 3 1YHT530004D05 D
Basic functions
78 615 series
Technical Manual