REFERENCES

Transmission Mode = Two-Ways

 

 

 

data

data

 

PowerScan®

BC-80X0

cable

Host

NACK

M8300

good RX

data

 

 

 

 

beep

 

 

ACK

 

 

 

 

ACK/NACK enabled

When ACK/NACK is enabled (in Two-Way tx mode), 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. Only after the ACK character is received by the BC-80X0 does the reader respond with the good reception tone.

If the BC-80X0 does not receive an ACK or NACK, transmission is ended after the RX Timeout, see par. 5.1.4. See also Radio Protocol Timeout, par. 5.9.1.

When ACK/NACK protocol is enabled, FIFO must be disabled manually, see par. 5.1.3.

5.1.3FIFO

PowerScan® D8330 Readers

This parameter determines whether data (barcodes) are buffered on a First In First Out basis allowing faster data collection in certain cases for example when using slow baud rates and/or hardware handshaking.

If the FIFO buffering is enabled, codes are collected and sent out on the serial line in the order of acquisition. About 800 characters can be collected (buffer full), after which the reader signals an error and discards any further codes until the transmission is restored.

If the FIFO buffering is disabled, each code must be transmitted before another one can be read.

PowerScan® M8300 Readers

If enabled, the BC-80X0 collects all messages sent by PowerScan® M8300 and sends them in order of acquisition to the connected Host.

If disabled, PowerScan® M8300 blocks message transmission until the BC-80X0 has completed transmission towards the Host.

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