I/O Filtering And Debounce - Microscan MicroHAWK MV-20 Manual

Chapter 2
System Components

I/O Filtering and Debounce

Trigger Debounce is the ability of the system to accommodate switching noise on a trigger state
change – a common issue with relays that have some intermittent contact while engaging.
Trigger overruns (when the vision system is triggered faster than the device can process)
can be avoided by increasing the "debounce" time in the camera definition file located in
the C:\Microscan\Vscape\Drivers\CamDefs directory.
The I/O Line Debounce High Time and IO Line Debounce Low Time can be added to the
file as in the example below. Debounce time is 1 ms (1,000 μs).
Note: Although the value entered for the "IO Line Debounce Time" is in microseconds, it
will only be rounded up to a millisecond value. For example, entering the value 1001 will
resolve to 2 ms; entering a value of 2800 will resolve to 3 ms.
The min value for "IO Line Debounce Time" is 0, which disables software debounce
altogether. The maximum value is 100000 (100 ms).
We have the standard debounce as described for the trigger:
IO Line Debounce High Time
IO Line Debounce Low Time
The MicroHAWK has an I/O Line Filter Time as well:
IO Line Filter High Time
IO Line Filter Low Time
I/O Filter is the ability to ignore any signals on the l/O lines that are less that the "Filter Time"
long. Sometimes, electrical interference puts spikes on the line. This feature makes it ignore
them until the signal that is seen on the I/O line is longer than the filter time.
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1000 //usecs (default is 0)
1000 //usecs (default is 0)
100 //usecs (default is 100)
100 //usecs (default is 100)
MicroHAWK MV-20 / MV-30 / MV-40 Smart Camera Guide