NCR 7890, Руководство пользователя, Страница: 92 / 217

Programming Your 7890 Scanner
Timers
User’s Guide 5-17
Timers
The Timers Programming mode controls the two 7890
Scanner timers: Lockout Time and Active Time. Refer to
the Timers worksheet in Appendix A.
The Lockout Timer prevents the scanner from
repeatedly reading the same bar code. After reading a
bar code, it must be removed from the scan pattern and
the time programmed in the Lockout Timer must elapse
before the scanner can read the same bar code again.
The Lockout Time parameter selects the lockout time.
There are 8 different times ranging from 450
milliseconds to 1500 milliseconds. You select these
times using the Hex 0 through Hex 7 tags. The default
time is 450 milliseconds.
The Restart Lockout Timer parameter controls restarting
the Lockout Timer each time the scanner reads the same
bar code. Turning on the Restart Lockout Timer option
has the following effect. After reading a bar code, if the
barcode moves out of the scan pattern and then back
into the scan pattern before the Lockout Timer times
out, the Lockout Timer restarts. The Hex 0 tag turns off
this option and the Hex 1 tag turns it on. The default is
on.
Lockout Time
Restart Lockout
Timer