Baumer SXC20c Посібник користувача - Сторінка 36

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Baumer SXC20c Посібник користувача

Debouncer:

Please note that the edges
of valid trigger signals are
shifted by t
and
DebounceHigh
t
!
DebounceLow
Depending on these
two timings, the trigger
signal might be temporally
stretched or compressed.
Figure 40 ►
Principle of the Baumer 
debouncer.
36
8.5.4. Debouncer
The basic idea behind this feature was to seperate interfering signals (short peaks) from 
valid square wave signals, which can be important in industrial environments. Debouncing
means that invalid signals are filtered out, and signals lasting longer than a user-defined 
testing time t
will be recognized, and routed to the camera to induce a trigger.
DebounceHigh
In order to detect the end of a valid signal and filter out possible jitters within the signal, a 
second testing time t
DebounceLow
If the signal value falls to state low and does not rise within t
as end of the signal.
The debouncing times t
DebounceHigh
of 1 μsec.
This feature is disabled by default.
U
30V
Incoming signals
(valid and invalid)
11V
4.5V
0
Debouncer
U
30V
Filtered signal
11V
4.5V
0
8.5.5.

Flash Signal

The CameraLink
 standard doesn't describe an explicite flash signal.
®
On  Baumer  cameras,  this  feature  is  realized  by  the  internal  signal  "ExposureActive", 
which can be wired to one of the digital outputs.
was introduced. This timing is also adjustable by the user. 
and t
are adjustable from 0 to 5 msec in steps
DebounceLow
t
t
1
2
t
DebounceHigh
t
high time of the signal
x
t
user defined debouncer delay for state high
DebounceHigh
t
user defined debouncer delay for state low
DebounceLow
, this is recognized
DebounceLow
t
t
t
t
3
4
5
6
t
DebounceLow
high
low
t
t
high
low
t