Microscan QX-830 User Manual page 215

Scanner Parameters
Number of Triggers
The number of triggers to examine for the trend analysis condition.
Number to Output On
Example: If Number to Output On is set to 3 and Trend Analysis Mode is set to No
Read, then the output will not be activated until 3 No Reads have occurred.
Sets the number of Trend Analysis Mode events (mismatches, No Reads, or reads/trigger
as configured by Trend Analysis Mode) to occur within the trigger evaluation period
before activating the associated output.
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QX-830 Compact Industrial Scanner User's Manual