Binary Input Inversion; Oscillation Suppression - ABB RELION 620 Series Technical Manual

1MAC504801-IB E
3.9.2
3.9.3
620 series ANSI
Technical Manual
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 41: Input filter parameter values
Parameter
Input # filter time

Binary input inversion

The parameter Input # invert is used to invert a binary input.
Table 42: Binary input states
Control voltage
No
Yes
No
Yes
When a binary input is inverted, the state of the input is TRUE (1) when no control voltage
is applied to its terminals. Accordingly, the input state is FALSE (0) when a control
voltage is applied to the terminals of the binary input.

Oscillation suppression

Oscillation suppression is used to reduce the load from the system when a binary input
starts oscillating. A binary input is regarded as oscillating if the number of valid state
changes (= number of events after filtering) during one second is equal to or greater than
the set oscillation level value. During oscillation, the binary input is blocked (the status is
invalid) and an event is generated. The state of the input will not change when it is blocked,
that is, its state depends on the condition before blocking.
The binary input is regarded as non-oscillating if the number of valid state changes during
one second is less than the set oscillation level value minus the set oscillation hysteresis
value. Note that the oscillation hysteresis must be set lower than the oscillation level to
enable the input to be restored from oscillation. When the input returns to a non-oscillating
state, the binary input is deblocked (the status is valid) and an event is generated.
Table 43: Oscillation parameter values
Parameter
Input osc. level
Input osc. hyst
Values
5...1000 ms
Input # invert
0
0
1
1
Values
2...50 events/s
2...50 events/s
Section 3
Basic functions
Default
5 ms
State of binary input
False (0)
True (1)
True (0)
False (0)
Default
30 events/s
10 events/s
89