Standard Features AW00089317000
238 Basler ace GigE
Synchronous Restart
You can restart the sequence cycle with input line 1 as the source for controling sequence cycle
restart.
In the following use case (see also Figure 99), the same settings were made as in the previous use
case: The Sequence Set Total Number parameter was set to six. Accordingly, the available
sequence set index numbers range from 0 through 5. The frame start trigger is set for rising edge
triggering. In addition, Line 1 was selected as the source for controlling restart. Line 1 is not set for
invert.
Assuming that the camera is in the process of continuously capturing images, the sequencer
feature operates as follows:
When the sequencer feature becomes enabled, the sequence set cycle starts: The parameter
values of the sequence set with sequence set index number 0 are loaded into the active set
modifying the active set.
When a frame start trigger is received, the camera automatically advances to the next sequence
set: The parameter values of sequence set 1 are loaded into the active set and are used for the
image acquisition.
When the next frame start trigger is received, the camera advances to the next sequence set:
The parameter values of sequence set 2 are used for the image acquisition.
When the next frame start trigger is received, the camera advances to the next sequence set:
The parameter values of sequence set 3 are used for the image acquisition.
When the next frame start trigger is received, input line 1 is found to be high. Accordingly,
another sequence set cycle is started and the parameter values of sequence set 0 are used for
the image acquisition.
Note that the synchronous restart has priority here over the automatic secquence set advance
that results from the Always Active sequence control source. Without the priority rule, sequence
set 1 would be used.
Note that the state of input line 1 went high well ahead of the frame start trigger.
Note also that the camera briefly exits the "waiting for frame start trigger" status while the input
line changes its state. This happened when input line 1 changed its state before the fourth frame
start trigger was received (see also Figure 99).
To ensure reliable synchronous sequence set restart, allow the elapse of at
least one microsecond between setting the state of the input line and the rise
of the frame start trigger signal.
Also, maintain the state of the input line at least for one microsecond after the
frame start trigger signal has risen.
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