Sync Group Delay Setting; Features Involved In Sensor Synchronization; Synchronization Settings - Dalsa Z-Trak2 2K Series User Manual

Sync Group Delay Setting

To avoid missed profile triggers, the Sync Group Delay setting must not be too small. The optimal value for this
feature depends mainly on network characteristics such as network link speed, packet size and number of
switches.
•
Network link speed. Sync Group Delay value needs to be longer if the primary sensor is connected on a
slower link; a 1 Gbps link will require a longer delay than a 5 Gbps link.
•
Streaming packet size. Sync Group Delay value needs to be longer if the primary is using large streaming
packet size because messages must wait until the current streaming packet is complete.
•
Network switch(es) between primary and secondary sensors. Each switch between primary and
secondary adds its own communication delay.
To better ascertain whether a 3D profiler is receiving messages too late and missing profile triggers, use the
Event Statistic Selector (Late MultiSensorSync) and Event Statistic Count features found in the Event category.
If LateMultiSensorSync event is detected by the profiler, the Sync Group Delay value must be increased.

Features Involved in Sensor Synchronization

The list shows the parameter name followed by the feature name in brackets.
•
Profile Trigger Frequency (profileTriggerFrequency)
•
Profile Rate (profileRate)
•
Profile Exposure Time (ExposureTime)
•
Laser Activation (laserActivation)
•
Sync Mode (multiSensorSyncMode)
•
Sync Status (multiSensorSyncStatus)
•
Sync Group (multiSensorSyncGroup)
•
Sync Group Delay (multiSensorSyncDelay)
•
Sync Group Delay Mode (multiSensorSyncDelayMode)
•
Trigger Mode Selector (TriggerSelector)
•
Trigger Enable (TriggerMode)
•
Trigger Start Source (TriggerSource)
•
Trigger Delay (TriggerDelay)
•
Line Selector (LineSelector)
•
Line Inverter (LineInverter)

Synchronization Settings

The parameters must be set manually, and their values can then be saved in a CCF. Some features may be set
indirectly, such as the Trigger Rate/Profile Trigger Frequency (which depend on the Trigger Start Source). The
user is responsible for making sure of the proper timing between sensors.
68 • Multi-Sensor Systems
Teledyne Vision Solutions
Z-Trak Family of 3D Sensors