Filter
Top Products
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.
9.3.3.2 OnOperationComplete
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 complete 0x0002
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.
Operator’s Manual LBA-PC
172
Local access is always the default. When LBA-PC is installed, the LBA-PC ActiveX server is automatically
registered for local access.