References
234 QuickScan™ I QD24XX/QBT24XX/QM24XX
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 properly, 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.
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
 has been set as 7 Data Bits.
1. Determine the desired character or value.
2. Use the ASCII Chart on the inside back cover of this manual to find the hex equivalent for 
the desired charac
ter/value.
3. Go to page 35 and 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, Key-
pad, that represent the desired character/value in step 1 above. The second character will 
cause a two-beep indication.
6. Scan the ENTER/EXIT PROGRAMMING MODE bar code to exit.
See Table 26 for some examples of how to set this feature.
Table 26. ACK Character Setting Examples
STEP ACTION EXAMPLES
1 Desired Character/Value
ACK $ @ >
2
Hex equivalent from 
ASCII 
Chart
0x06  0x24 0x40 0x3E
3 Scan ENTER/EXIT PROGRAMMING MODE
4 Scan SELECT ACK CHARACTER SETTING
5
Scan Two Characters from 
Appendix D, Keypad
‘0’ and ‘6’ ‘2’ and ‘4’ ‘4’ and ‘0’ ‘3’ AND ‘E’
6 Scan ENTER/EXIT PROGRAMMING MODE