ABB Remote I/O RIO600 Installation And Commissioning Manual page 171

1MRS757488 H
RIO600
Installation and Commissioning Manual
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GUID-13DA5833-D263-4E23-B666-CF38B1011A4B V1 EN
Figure 87: 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 starts when the time t
filter time, which means that the change in the input state is detected and the time tag
attached to the input change is t
tag t is attached.
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Binary input inversion
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.
LEDs and WHMI reflect the physical input signal present on the binary input terminal.
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 configured time period (as per
oscillation time parameter) 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 does 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 configured time period is less than the set oscillation level value minus the set
oscillation hysteresis value. The oscillation hysteresis must be set lower than the
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5 5
. The high state starts when t
0
Section 6
Commissioning
exceeds the
0
is detected and the time
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