Chapter 19 Exclusive Functions for Event Input Module
19-16
2. An example of chatter setting
Condition: A) Input filter: 1ms
B) Detail event setting: ‘Rise’ event
C) Chatter event: 4
D) Chatter time: 8ms
Sequence diagram of event occurrence;
1) Input signal
2) Event behavior
(6 times)
3) Filter time
(Filter time check)
4) Event occurrence
5) No. of events
2.5㎳ 0.75㎳ 1.25㎳
1㎳ 1㎳ 1㎳
①
1㎳
0.5㎳ 1.0㎳ 0.5㎳0.5㎳ 0.5㎳0.5㎳ 0.5㎳ 1.25㎳
Events ignored by chatter detection function
②
- Chatter time measurement: begins from the recognition of an event
- Two of the four events passing the filter are ignored by chatter detection function.
The last event which enters after expiration of the chatter detection time is recorded normally as
the first event of a new period
To Next Page
Loading...
