Datalogic MAGELLAN 3200VSI, Справочное руководство

Страница: 193 / 206

Product Reference Guide 185
Appendix I
Handheld Data Format Requirements
This appendix provides application notes to describe the general format of data
that can be accepted by the scanner through the auxiliary port as transmitted
from a handheld scanner.
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.”