Omron V530-R150, Руководство по эксплуатации

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3-4 Section System Examination
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3-4 System Examination
Processing Time Calculation
Processing time (reading time) is calculated as follows:
Processing
time Shutter time
of camera Delay of loading
image (see note) Loading image
time (33.3 ms
fixed)
+ +
Decode time Display time
+ +
=
Note A delay will occur before starting to load video monitor images if
through images are displayed. A delay may also occur depend-
ing on the trigger input method.
Reading Moving Objects
Please note the following to prevent delay when loading images.
•
Use the TRIG A signal for timing input.
As the TRIG A signal is synchronous with the shutter input of
the Camera, an accurate image of the moving object can be
obtained.
•
Set the image to be displayed on the video monitor to “Freeze”.
When through images are displayed, a delay of 33.3 ms max.
occurs before loading images after the TRIG A signal input.
Line Speed
If the object moves while the image is being loaded after the shut-
ter is released, the image will be blurred. Set the line speed ac-
cording to the shutter speed (using V530-R150 menu), the cell
size of objects, and the field of vision of the Camera.
Tact Time
A certain interval is necessary between reading objects during
which the next trigger signal is not input. This interval (time) is
called “Tact Time”.
(e.g.) Processing time for reading: 500 ms; Line speed: 30 m/min
30
60
×
0.5 = 0.25
The distance moved in 500 ms is 0.25 m. Therefore, an interval
allowing 0.25 m min. of movement is necessary.
Number of Retries
If reading is NG, reading continues to be performed for the num-
ber of retries specified by the setting conditions. When reading
moving objects, reading may continue after the object has left the
field of vision. Set the number of retries so that reading is per-
formed while the object is still within the field of vision, or set to 0.