National Instruments NI Vision NI 17xx 用户手册

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You can determine the maximum frame rate for your configuration in 
software by reading the Max Frame Rate indicator in Vision Builder AI, 
reading the Max Frame Rate property in LabVIEW, or reading the Max 
Frame Rate indicator in MAX. When external triggering is enabled, do not 
trigger faster than the maximum frame rate.

Sending a trigger faster than the maximum frame rate will result in a missed trigger.

Use Equation 5-2 to understand how software determines the maximum 
frame rate:

(5-2)

where

max frame rate for selected scan mode is determined by the 
partial scan mode and binning mode, as described in the 
Determining the Scan Mode section, and

min frame period is the minimum amount of time for the strobe 
and trigger mode, as described in the 

 section.

The maximum frame rate for selected scan mode is determined by the 
partial scan mode and binning mode. Because the amount of data read out 
of the sensor is less in 1/2 or 1/4 scan mode, the readout takes less time, and 
you can achieve faster frame rates. The same is true of binning. When 
binning is enabled, the readout takes less time, and you can achieve faster 
frame rates. Refer to the 

 sections of 

Chapter 3, 

, for more information about partial scanning 

and binning.

Use the maximum frame rate specifications for your smart camera in your 
scan mode in Appendix A, 

, to determine the maximum frame 

rate for selected scan mode.

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