Microscan QX-830 - Page 361

QX-830 Compact Industrial Scanner User’s Manual A-73
Appendices
ACK/NAK Data Flow Examples
Setup 1
Transfer 1
Transfer 2
Error Condition
Transfer 1
Transfer 2
RES 0x00 (disabled)
REQ 0x00 (disabled)
STX 0x00 (disabled)
ETX 0x00 (disabled)
ACK 0x06
NAK 0x15
LRC disabled
HOST_TX <K141,0>
SCANNER_TX ‘ACK’
HOST_TX <K141?>
SCANNER_TX ‘ACK’
SCANNER_TX <K141,0>
HOST_TX ‘ACK’
SCANNER_TX symbol data
HOST_TX ‘NAK’ (host rejects)
SCANNER_TX symbol data (resend data)
HOST_TX ‘ACK’ (transaction complete)
HOST_TX <K141?>
SCANNER_TX ‘ACK’
SCANNER_TX <K141,0>
timeout reached...
timeout reached...
timeout reached...
Timeout Reached transaction aborted, data is flushed