HP Linear Barcode Scanner II, Руководство программиста

Страница: 245 / 306

USB COM (RS-232) Parameters
Programming Reference Guide 235
ACK NAK Timeout Value
This option specifies the amount of time the reader waits for an ACK character
from the host following label transmission. The selectable timeout range is 200
milliseconds to 15,000ms (15 seconds) in 200ms increments. A selection of 0
disables the timeout.
To set this value:
1. Determine the desired setting in milliseconds.
2. Divide the desired setting by 200 (setting is in 200ms increments). Pad
the result with leading zeroes to yield two digits. For example: 0 = 00, 5 =
05, 20 = 20, etc.
3. Scan the ENTER/EXIT PROGRAMMING MODE bar code to enter Program-
ming Mode.
4. Scan the bar code: SELECT ACK NAK TIMEOUT VALUE SETTING.
5. Scan the appropriate two digits from the keypad in
Appendix D, Keypad , that
represent the duration which was determined in the steps above. You will
hear a two-beep indication after the last character.
6. Scan the ENTER/EXIT PROGRAMMING MODE bar code to exit Programming
Mode.
This completes the procedure. See Table 19 for some examples of how to set
this feature.
Table 7. ACK NAK Timeout Value Setting Examples
NOTE
If you make a mistake before the last character, scan the CANCEL bar
code to abort and not save the entry string. You can then start again at
the beginning.
STEP ACTION EXAMPLES
1 Desired Setting
200ms 1,000ms (1 sec.) 5200ms (5.2 sec.) 15,000ms (1 sec.)
2 Divide by 200
01 05 26 75
3 Scan ENTER/EXIT PROGRAMMING MODE
4 Scan SELECT ACK NAK TIMEOUT VALUE SETTING
5
Scan Two Characters From
Appendix D, Keypad
‘0’ and ‘1’ ‘0’ and ‘5’ ‘2’ and ‘6’ ‘7’ and ‘5’
7 Scan ENTER/EXIT PROGRAMMING MODE