Datalogic QuickScan I QM2131, Product Reference Manual

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Enter/Exit Programming Mode Double Read Timeout
70 QuickScan™ I QM21X1 / QBT21X1
Double Read Timeout
To prevent a double read of the same label, the Double Read Timeout sets the
minimum time allowed between reads of labels of the same symbology and
data. If the unit reads a label and sees the same label again within the Double
Read Timeout, the second read of the label will be ignored. Double Read Time-
out does not apply to scan modes that require a trigger pull for each label that
is read.
$CSNDR0A 
Double Read Timeout = 0.1 Second
$CSNDR14 
Double Read Timeout = 0.2 Second
$CSNDR1E 
Double Read Timeout = 0.3 Second
$CSNDR28 
Double Read Timeout = 0.4 Second
$CSNDR32 
Double Read Timeout = 0.5 Second