8 - 12 DS3578 With FIPS Digital Scanner Product Reference Guide
Software Handshaking
This parameter offers control of the data transmission process in addition to, or instead of, that offered by hardware
handshaking. If software handshaking and hardware handshaking are both enabled, hardware handshaking takes
precedence.
Select one of the following five options:
•
None
- Select this option to transmit data immediately. No response is expected from the host.
•
ACK/NAK
- When this option is selected, after transmitting data, the digital scanner expects either an ACK or
NAK response from the host. When a NAK is received, the digital scanner transmits the same data again and
waits for either an ACK or NAK. After three unsuccessful attempts to send data when NAKs are received, the
digital scanner issues an error indication and discards the data.
The digital scanner waits up to the programmable Host Serial Response Time-out to receive an ACK or NAK.
If the digital 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
- When this option is selected, the digital scanner waits for an ENQ character from the host before
transmitting data. If an ENQ is not received within the Host Serial Response Time-out, the digital 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.
•
XON/XOFF
- An XOFF character turns the digital scanner transmission off until the digital scanner receives an
XON character. There are two situations for XON/XOFF:
•
XOFF
is received before the digital scanner has data to send. When the digital scanner has data to send, it
waits up to Host Serial Response Time-out for an XON character before transmission. If the XON is not
received within this time, the digital scanner issues an error indication and discards the data.
•
XOFF
is received during a transmission. Data transmission then stops after sending the current byte.
When the digital scanner receives an XON character, it sends the rest of the data message. The digital
scanner waits up to 30 seconds for the XON.
Summary of Contents for SYMBOL DS3578
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Page 3: ...DS3578 with FIPS Digital Scanner Product Reference Guide 72E 153466 04 Revision A May 2012 ...
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Page 197: ...RS 232 Interface 8 23 ...
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Page 366: ...B 8 DS3578 With FIPS Digital Scanner Product Reference Guide ...
Page 367: ...Appendix C Sample Bar Codes UPC A UPC E 0 12345 67890 5 0 123456 5 ...
Page 369: ...Sample Bar Codes C 3 Trioptic Code 39 Code 93 Code 11 456123 12345ABCDE Æ1234567890Æ ...
Page 371: ...Sample Bar Codes C 5 PDF417 Data Matrix Maxicode ...
Page 372: ...C 6 DS3578 With FIPS Digital Scanner Product Reference Guide QR Code US Postnet UK Postal ...
Page 373: ...Appendix D Alphanumeric Bar Codes Alphanumeric Keyboard Space ...
Page 374: ...D 2 DS3578 With FIPS Digital Scanner Product Reference Guide Alphanumeric Keyboard continued ...
Page 375: ...Alphanumeric Bar Codes D 3 Alphanumeric Keyboard continued ...
Page 376: ...D 4 DS3578 With FIPS Digital Scanner Product Reference Guide Alphanumeric Keyboard continued ...
Page 377: ...Alphanumeric Bar Codes D 5 Alphanumeric Keyboard continued _ ...
Page 379: ...Alphanumeric Bar Codes D 7 Alphanumeric Keyboard continued 5 6 7 8 9 End of Message Cancel ...
Page 381: ...Alphanumeric Bar Codes D 9 Alphanumeric Keyboard continued G H I J K L ...
Page 383: ...Alphanumeric Bar Codes D 11 Alphanumeric Keyboard continued S T U V W X ...
Page 385: ...Alphanumeric Bar Codes D 13 Alphanumeric Keyboard continued e f g h i j ...
Page 387: ...Alphanumeric Bar Codes D 15 Alphanumeric Keyboard continued q r s t u v ...
Page 389: ...Alphanumeric Bar Codes D 17 Alphanumeric Keyboard continued ...
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Page 394: ...E 4 DS3578 With FIPS Digital Scanner Product Reference Guide ...
Page 406: ...F 12 DS3578 With FIPS Digital Scanner Product Reference Guide ...
Page 418: ...Glossary 8 DS3578 With FIPS Digital Scanner Product Reference Guide ...
Page 426: ...Index 8 DS3578 With FIPS Digital Scanner Product Reference Guide ...
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