POWERSCAN® D8330/M8300

5.1.2ACK/NACK ProtocolPowerScan® 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.

 

 

data

 

PowerScan

®

cable

Host

D8330

 

ACK or NACK

ACK/NACK enabled

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

 

 

 

 

data

data

 

PowerScan

®

BC-80X0

cable

Host

M8300

 

good RX

 

 

 

 

beep

 

 

ACK/NACK disabled

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