User`s guide

EventLog
18-13
EventLog
Store information about events
Description
The EventLog property is an array of structures that stores information about events.
Each structure in the array represents one event. Events are recorded in the order in
which they occur. The first EventLog structure reflects the first event recorded, the
second EventLog structure reflects the second event recorded, and so on.
Each event log structure contains two fields: Type and Data.
The Type field stores a character array that identifies the event type. The Image
Acquisition Toolbox software defines many different event types, listed in this table. Note
that not all event types are logged.
Event Type Description Included in Log
Error Run-time error occurred. Run-time errors
include timeouts and hardware errors.
Yes
Frames Acquired The number of frames specified in the
FramesAcquiredFcnCount property has
been acquired.
No
Start Object was started by calling the start
function.
Yes
Stop Object stopped executing. Yes
Timer Timer expired. No
Trigger Trigger executed. Yes
The Data field stores information associated with the specific event. For example,
all events return the absolute time the event occurred in the AbsTime field. Other
event-specific fields are included in Data. For more information, see “Retrieving Event
Information” on page 8-8.
EventLog can store a maximum of 1000 events. If this value is exceeded, then the most
recent 1000 events are stored.