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Please refer to Host Response Delay to determine if you need to compensate
for slow host program response by slowing down the retry time when failing
to get a response from the base station.
Host Response Delay
(This parameter only applies to serial 2-way Base Stations - B58/B59 with Host
controlled acknowledge enabled.)
If you have a serial 2-way Base Station with Host controlled acknowledge
enabled under Protocol, and your host computer program is slower in
responding than 1/2 second, in order to reduce retry radio traffic, you need to
specify a new delay time. This parameter needs to be set for each 2-way laser
scanner used. Specify in 1/10 seconds of 01 (.1 secs) to 99 (9.9 secs).
Suppose you are running a Unix application that takes 1 second from receipt
of data to respond: specifying 10 will add one second to the retry delay,
thereby increasing the listening time before retrying. This is particularly
important when operating multiple scanners on one base station, but it is also
helpful with only one scanner. Even with one scanner, the acknowledgement
can collide with a retry without sufficient delay.
With normal Windows and DOS applications, the host response is so fast, it is
not necessary to change this parameter. However, if you have a very
complicated program that must access multiple databases for each data item
transmitted, you may need to specify additional delay.
Test the Reader with your computer
If you are connected by keyboard interface, or if you have a serial reader and
are using PortKey with an IBM compatible, you should be able to scan the bar
code on the next page, hear a beep (2 beeps on 2-way laser), and see data
displayed on the computer's screen. First get your computer to some program
where you can type and see it on the screen, (i.e. Notepad). Now scan the
TEST LABEL on the following page. Your screen should show:
TEST LABEL
If you can't read the TEST LABEL, see the Scanning Techniques back on page
10. If you don't get a beep, try moving closer to the Base Station and moving
the scanner closer or farther away from the bar code. If you get a beep (two
beeps with 2-way laser scanner), but no data displayed:
1. Be sure your
Computer Interface is set correctly,
2. Try
the
Learned Timing computer interface settings as detailed in the
Installation and Setup section of this manual.
If you still have trouble, see the Troubleshooting section of this manual.
If you are connected to serial port and aren't using
PortKey, you will need to
use a communications program; or use the
WDR Serial Test Program
