JAI CV-A33CL - Manual (Page 18)

CV-A33CL
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6.4.4. Auto trigger Mode
The auto trigger function, TR=3 can be used as sensing device inside the camera field of view. It
sense in a programmable window from top of the image. The continuous output is sent to the
frame grabber, which PC should be programmed to sense if an object is passing the window. The
horizontal position and the signal threshold could be the programmed parameters. If an object
passing is detected, a trigger is send to the camera. The resulting image, a full frame or
windows scan, (depending of windows scan setting), is read out to the grabber, and the auto
trigger function with fast scan of the programmed window will start again.
To use this mode:
Set function:
Trigger mode “Auto Trigger Mode” TR=3
“Auto Trigger” AT=3 through 493
“Windows” “Full” or “windows scan” WS=0, WS=1
Polarity and other functions
PC and grabber:
Detect trigger conditions
Send a pulse width control trigger to the camera.
Input:
Ext. trigger to Camera Link or pin #10 on 12-pin connector.
Important notes on using this mode.
• The exposure is equal the programmable parameter AT.
• The exposure time is the same for the auto trigger partial scanned frame and the
resulting triggered frame read out.
• The duration of the trigger should be >1 LVAL to < 1 FVAL. (>16.8 µsec. to <8.3 msec.)
• Refer to 6.1.7. Auto Trigger Window of Interest.
• Max auto trigger frame rate is 5403 fps.
DVAL
DATAOUT
0 1 2 0 1 2 1 2 0 1 2 3 4 0 0 1 2 0 1 2 0 1 2 48
9
49
0
49
1
49
2
48
8
per iod
Exposure
EEN
FVAL
LVAL
TRG
3L
11L
4L 4L
502L
493L 5L 4L
E f fec t ive P ixe ls
1 FVAL per iod 1 FVAL per iod
E f fec t ive L ines
When Trgger is inpu t .
1 LVAL = 16.825µs
Fig. 23. Vertical timing for auto trigger function