Datalogic Scanning QUICKSCAN QS6500BT - Manual (Page 236)

Symbologies
6-148 QuickScan ® QS6500/QS6500 BT
UK-Plessey
The following options apply to the UK/Plessey symbology.
Disable/Enable UK/Plessey
When this feature is disabled, the imager will not read UK/Plessey bar
codes.
Checksum Verification
When enabled, the imager will verify the check sum of the labels.
Checksum Transmit
When this option is enabled, the imager will transmit the checksum.