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Handheld Data Format Requirements
This appendix provides application notes to describe the general format of data
that can be accepted by the scanner from a handheld scanner connected via the
USB port.
Handheld Data Format Requirements General
•
9600 bps, 8 data bits, 1 stop bit, no parity.
•
RTS is used to "bracket" the data received from the handheld: RTS must be
asserted high during data transmission, and de-asserted after label trans-
mission is complete. CTS is used to hold off transmission of label from
handheld.
•
Symbologies requiring fixed lengths (UPC/EAN) will enforce length
requirements for validation of the label.
•
Handheld will be required to transmit start and stop characters for Cod-
abar and Code 39 labels.
•
Appropriate industrial length requirements will be enforced (if configured)
for validation of the label.
•
Maximum label lengths will be enforced for label validation (i.e. labels lon-
ger than the maximum label size will not be validated).
•
Standard Datalogic formats generally use a single prefix character. The
specific formats are provided below.
•
Suggest that handheld turn off audible and visual good read indications to
minimize operator confusion.
•
Scanner will indicate if a label of improper format has been received from
the handheld by sounding a "trill."
Product Reference Guide
Appendix I
331
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