Code 128, Code 128 enable/disable, Expand code 128 to code 39 – Datalogic QuickScan I QD2400 User Manual
Page 132: Code 128 enable/disable expand code 128 to code 39, Default

Enter/Exit Programming Mode
Code 128
122
QuickScan™ I QD24XX/QBT24XX/QM24XX
CODE 128
The following options apply to the Code 128 symbology.
Code 128 Enable/Disable
When disabled, the reader will not read Code 128 bar codes.
$CC8EN00(CR)
Code 128 = Disable
$CC8EN01(CR)
Code 128 = Enable
DEFAULT
Expand Code 128 to Code 39
This feature enables/disables expansion of Code 128 labels to Code 39 labels.
DEFAULT
$CC8C300(CR)
Code 128 to Code 39 = Don’t Expand
$CC8C301(CR)
Code 128 to Code 39 = Expand