REFERENCES139OM-GRYPHON™ HostdatacableNACKACKdataGRYPHON™ Mdatagood RXbeepACK/NACK enabledWhen ACK/NACK is enabled, the Host sends an ACK character (06 HEX) in the caseof good reception or the NACK character (15 HEX) requesting re-transmission, in thecase of bad reception. Only after the ACK character is received by theOM-Gryphon™ does the reader respond with the good reception tone.If the reader does not receive an ACK or NACK, transmission is ended after the RXTimeout (see par. 5.1.4). See also Radio Protocol Timeout, par. 5.8.1 for M-Seriesreaders.Selection of the ACK/NACK protocol temporarily disables FIFO buffering see par.5.1.3.5.1.3 FIFOGRYPHON™ D Series ReadersThis parameter determines whether data (barcodes) are buffered on a First In FirstOut basis allowing faster data collection in certain cases for example when using slowbaud 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.GRYPHON™ M Series ReadersIf enabled, the OM-Gryphon™ collects all messages sent by Gryphon™ M and sendsthem in order of acquisition to the connected Host.If disabled, Gryphon™ M blocks message transmission until theOM-Gryphon™ has completed transmission towards the Host.
