REFERENCES 5OM-30X0 HostdatacableDRAGON™ MdataNACKACKgood RXbeepTransmission Mode = Two-WaysdataACK/NACK enabledWhen ACK/NACK is enabled (in Two-Way tx mode), the Host sends an ACKcharacter (06 HEX) in the case of good reception or the NACK character (15 HEX)requesting re-transmission, in the case of bad reception. Only after the ACKcharacter is received by the OM-30X0 does the reader respond with the goodreception tone.If the OM-30X0 does not receive an ACK or NACK, transmission is ended after theRX Timeout, see par. 5.1.4. See also Radio Protocol Timeout, par. 5.8.1.When ACK/NACK protocol is enabled, FIFO must be disabled manually, see par.5.1.3 FIFODragon™ D131 ReadersThis parameter determines whether data (barcodes) are buffered on a First In FirstOut basis allowing faster data collection in certain cases for example when usingslow baud rates and/or hardware handshaking.If the FIFO buffering is enabled, codes are collected and sent out on the serial line inthe order of acquisition. About 800 characters can be collected (buffer full), afterwhich the reader signals an error and discards any further codes until thetransmission is restored.If the FIFO buffering is disabled, each code must be transmitted before another onecan be read.Dragon™ M131 ReadersIf enabled, the OM-30X0 collects all messages sent by Dragon™ M131 and sendsthem in order of acquisition to the connected Host.If disabled, Dragon™ M131 blocks message transmission until the OM-30X0 hascompleted transmission towards the Host.5.1.3.133
