Datalogic QuickScan QD2590, Руководство по продукции

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REFERENCES
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QUICKSCAN™ QD2590
ACK NAK Options
This enables/disables the ability of the reader to support the RS-232 ACK/NAK protocol.
When configured, the reader and/or host sends an “ACK” when it receives data prop-
erly, and sends “NAK” when the data is in error.
Options are:
• Disable
• Enable for label transmission — The reader expects an ACK/NAK response from
the host when a label is sent
• Enable for host-command acknowledge — The reader will respond with ACK/NAK
when the host sends a command
• Enable for label transmission and host-command acknowledge
ACK Character
This setting specifies an ASCII character or hex value to be used as the ACK character.
ASCII characters or any hex value from 0 to 0xFF can be selected.
1. Determine the desired character or value.
2. Use the ASCII Chart on
page 290
to find the hex equivalent for the desired charac-
ter/value.
3. Scan ENTER/EXIT PROGRAMMING MODE to enter Programming Mode.
4. Scan the bar code: SELECT ACK CHARACTER SETTING.
5. Scan the appropriate two alphanumeric characters from the keypad in
Appendix D
,
that represent the desired character/value determined above. The second charac-
ter will cause a two-beep indication.
6. Scan the ENTER/EXIT PROGRAMMING MODE bar code to exit.
See the table below for examples of how to set this feature.
Table 3 - ACK Character Setting Examples
NOTE: Setting to previously defined characters such as XON, XOFF, or host
commands conflicts with normal operation of these characters. 8-bit data
is not recognized when the option Data Bits
page 30
has been set as 7 Data
Bits.
STEP ACTION EXAMPLES
1 Desired Character/Value ACK $ @ >
2
Hex equivalent from ASCII Chart
on
page 290
0x06 0x24 0x40 0x3E
3 Scan ENTER/EXIT PROGRAMMING MODE
4 Scan SELECT ACK CHARACTER SETTING
5
Scan two characters from
Appendix D
‘0’ and ‘6’ ‘2’ and ‘4’ ‘4’ and ‘0’ ‘3’ AND ‘E’
6 Scan ENTER/EXIT PROGRAMMING MODE