User`s guide

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Purpose Obtain exclusive use of image a cquisition device
Syntax start(obj)
Description start(obj) obta ins exclusiv e u se of the image a cquisition de vice
associated with the video input object
obj and locks the device’s
configuration. Starting an object is a necessary first step to acquire
image data, but it does not control w hen data is logged.
obj can either be a 1-by-1 video input object or an array of video input
objects.
Data logging is controlled with the
TriggerType property.
Trigger Type Logging Behavior
'hardware'
Data logging occurs when the condition specified
in the object’s
TriggerCondition property is met
via the
TriggerSource.
'immediate'
Data logging occurs immediately.
'manual'
Data logging occurs when the t rigger function is
called.
Use the triggerconfig function to configure the object’s trigger
settings.
When an acqu isitio n is started ,
obj performs the following operations:
1 Transfers the object’s configuration to the associated hardware.
2 Executes the object’s Start Fcn callback.
3 Sets the object’s Running property to 'On'.
If the object’s
StartFcn errors, the hardware is never started and the
object’s
Running property re mains 'Off'.
The start event is recorded in the object’s
EventLog property.
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