HP Integrated Barcode Scanner HP Integrated Barcode Scanner Programming Reference Guide

USB COM Parameters
Programming Reference Guide 187
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.
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
character/value.
3. Go to page 17 and scan ENTER/EXIT PROGRAMMING MODE to enter Programming Mode.
4. Scan the barcode: SELECT ACK CHARACTER SETTING.
5. Scan the appropriate two alphanumeric characters from the keypad in Appendix D, Keypad, that repre-
sent the desired character/value in step 1 above. The second character will cause a two-beep indication.
6. Scan the ENTER/EXIT PROGRAMMING MODE barcode 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