Ack/Nack Protocol - Datalogic PowerScan D8300 Reference Manual

5.1.2

ACK/NACK Protocol

®
PowerScan D8330 Readers
This parameter sets a transmission protocol in which the Host responds to the reader
after every code transmitted. The Host sends an ACK character (06 HEX) in the case
of good reception or the NACK character (15 HEX) requesting re-transmission, in the
case of bad reception.
PowerScan
If the reader does not receive an ACK or NACK, transmission is ended after the
RX Timeout (see par. 5.1.4).
When ACK/NACK protocol is enabled, FIFO must be disabled manually, see par.
5.1.3.
®
PowerScan M8300 Readers
The transmission protocol takes place between reader, cradle and Host. The reader
passes its data (code read) to the cradle, which sends it to the Host. The
management of responses (from Host or cradle) depends on the Transmission Mode
parameter, see par. 5.9.4.
In the following descriptions the completed transmission is indicated by the Beeper
Control for Radio Response parameter with its default setting to Normal, see par.
5.9.5.
When ACK/NACK is disabled (in One-Way tx mode), there is no control from cradle
to Host transmission, the reader responds with the good reception tone.
Transmission Mode = One-Way
®
PowerScan
M8300
®
D8330
ACK/NACK enabled
data
BC-80X0
good RX
beep
ACK/NACK disabled
data
cable
ACK or NACK
data
cable
REFERENCES
Host
Host
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