User`s guide

Specifying the Trigger Type

6-11

TriggerType: 'immediate'

TriggerCondition: 'none'

TriggerSource: 'none'

This example sets the value of the FramesPerTrigger property to 5. (The default is

10 frames per trigger.)

vid.FramesPerTrigger = 5

Start the image acquisition object — Call the start function to start the image

acquisition object. By default, the object executes an immediate trigger and acquires

five frames of data, logging the data to a memory buffer. After logging the specified

number of frames, the object stops running.

start(vid)

To verify that the object acquired data, view the value of the FramesAcquired

property. The object updates the value of this property as it acquires data.

vid.FramesAcquired

ans =

To execute another immediate trigger, you must restart the object. Note, however,

that this deletes the data acquired by the first trigger. To execute multiple

immediate triggers, specify a value for the TriggerRepeat property. See

“Specifying Multiple Triggers” on page 6-32 for more information.

Clean up — Always remove image acquisition objects from memory, and the

variables that reference them, when you no longer need them.

delete(vid)

clear vid

Using a Manual Trigger

To use a manual trigger, create a video input object and set the value of the

TriggerType property to 'manual'. A video input object executes a manual trigger

after you issue the trigger function. The following figure illustrates a manual trigger.