System Examination - Omron V530-R150E-3 Operation Manual

System Examination

3-4

System Examination

Processing Time Calculation
Processing
=
time
Note A delay of 33.3 ms max. will occur before starting to load monitor
Reading Moving Objects
44
Processing time (reading time) is calculated as follows:
Shutter time
of camera
images if through images are displayed. A delay may also occur
depending on the trigger input method.
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 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 shutter
is released, the image will be blurred. Set the line speed according 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
The distance moved in 500 ms is 0.25 m. Therefore, an interval allow-
ing 0.25 m min. of movement is necessary.
Number of Retries
If reading is NG, reading continues to be performed for the number 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 performed while
the object is still within the field of vision, or set to 0.
Delay of loading
+
image (see note)
+
Decode time
30
× 0.5 = 0.25
60
Section 3-4
Loading image
+
time (33.3 ms
fixed)
+
Display time