Sigma LBA-708, LBA-710, LBA-714PC, LBA-300, LBA-712, LBA-500PC Dcom, OnOperationComplete, False, True

Capture Mode
Single Shot	N/A	The LBA-PC stops after collecting one frame.
		Property values will not change until the LBA-
		PC receives another Start command.
Continuous	FALSE	The LBA-PC will continuously update property
		values. By the time a VI can read property
		values after the OnNewFrame event, the values
		have changed. Use this configuration if you do
		not care which frame the properties relate to.
Continuous	TRUE	The LBA-PC will set property values that
		correspond to the same frame of data. These
		values will remain until you reset NewFrame to
		FALSE.

OnNewFrame.vi contains an example of reading property values after receiving an OnNewFrame event. All example VIs are packaged in LbapcActiveX.llb, which can be found in the “ActiveX\Examples\LabVIEW” directory under the LBA-PC installation directory.

In Visual Basic you can read any desired properties during this event. All properties correspond to the same frame of data. After return from this event property values will change.

9.3.3.2OnOperationComplete

This event fires when Ultracal is finished or the LBA-PC is stopped because Statistics Frames or Time has expired. This event passes an integer bit flag as a parameter. This bit flag is identical to the OperationComplete property and is defined as follows.

Ultracal complete 0x0001

Auto Exposure complete0x0002

In LabVIEW, the parameter data is part of the Event Data cluster output from the Wait On ActiveX Event VI. Unbundle the Event Data, index the ParamData array, and convert the result using the ‘Variant To Data’ VI. Ultracal.vi contains an example of calling the Ultracal method and responding to the OnOperationComplete event. Example VI’s are packaged in LbapcActiveX.llb, which can be found in the “ActiveX\Examples\LabVIEW” directory under the LBA-PC installation directory.

9.4 DCOM

ActiveX is based on Component Object Model (COM) technology. DCOM, Distributed COM, extends COM to support communication among objects on different computers—on a local area network (LAN), a wide area network (WAN), or even the Internet.

The LBA-PC ActiveX server supports DCOM. The LBA-PC ActiveX server always runs on the LBA-PC computer and can easily be configured for local or remote access. Properties, methods, and events are the same as described above, whether local or remote.

Local access is always the default. When LBA-PC is installed, the LBA-PC ActiveX server is automatically registered for local access.

Operator’s Manual 172 LBA-PC