RS-232 Interface 8 - 15
Hardware Handshaking (continued)
Software Handshaking
This parameter offers control of the data transmission process in addition to, or instead of, that offered by hardware
handshaking. There are five options.
If software handshaking and hardware handshaking are both enabled, hardware handshaking takes precedence.
•
None: Select this option to transmit data immediately. No response is expected from host.
•
ACK/NAK: If you select this option, after transmitting data, the digital imager scanner expects either an ACK
or NAK response from the host. When it receives a NAK, the digital imager scanner transmits the same data
again and waits for either an ACK or NAK. After three unsuccessful attempts to send data after receiving
NAKs, the digital imager scanner issues an error indication and discards the data.
The digital imager scanner waits up to the programmable Host Serial Response Time-out to receive an ACK
or NAK. If the digital imager scanner does not get a response in this time, it issues an error indication and
discards the data. There are no retries when a time-out occurs.
•
ENQ: If you select this option, the digital imager scanner waits for an ENQ character from the host before
transmitting data. If it does not receive an ENQ within the Host Serial Response Time-out, the digital imager
scanner issues an error indication and discards the data. The host must transmit an ENQ character at least
every Host Serial Response Time-out to prevent transmission errors.
•
ACK/NAK with ENQ: This combines the two previous options. For re-transmissions of data, due to a NAK
from the host, an additional ENQ is not required.
RTS/CTS Option 2
RTS/CTS Option 3
Summary of Contents for SYMBOL DS6707
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Page 151: ...RS 232 Interface 8 9 Baud Rate 2400 Baud Rate 4800 ...
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Page 275: ...Advanced Data Formatting 11 15 UK Postal ...
Page 328: ...11 68 Symbol DS6707 Digital Imager Scanner Product Reference Guide Send Alt F ...
Page 353: ...Advanced Data Formatting 11 93 Alphanumeric Keyboard Space Single Close Quote Dash ...
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Page 359: ...Advanced Data Formatting 11 99 Alphanumeric Keyboard continued D E F G H I J ...
Page 361: ...Advanced Data Formatting 11 101 Alphanumeric Keyboard continued R S T U V W X ...
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Page 365: ...Advanced Data Formatting 11 105 Alphanumeric Keyboard continued r s t u v w x ...
Page 384: ...B 8 Symbol DS6707 Digital Imager Scanner Product Reference Guide ...
Page 385: ...Appendix C Sample Bar Codes Code 39 UPC EAN UPC A 100 123ABC 0 12345 67890 5 ...
Page 388: ...C 4 Symbol DS6707 Digital Imager Scanner Product Reference Guide Maxicode QR Code US Postnet ...
Page 389: ...Sample Bar Codes C 5 UK Postal ...
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