
6-2
LS 1220 Product Reference Guide
3.
Scan
Make sure the symbol to be scanned is within the scanning range. See Calculating
The Usable Scan Length Method on page 2-5.
Align the bar code and trigger the unit.
•
The scan beam lights until the programmed Laser On Time-out limit is reached,
or until a successful decode.
The symbol is successfully decoded when the green DECODE LED lights.
Triggering
The LS 1220 can be energized using any one of seven different methods. Host download
is not permitted with the scanner activated. To download, send the Laser Off command first.
A Laser Off command from the host turns off the laser in all of the following modes. Refer
to Trigger Modes on page 9-19for further details.
Host
The host sends a Laser On command which activates the laser, and begins the decoding
process. The external trigger also energizes the laser, and acts as a “Level Trigger” in this
mode.
Laser and decoding are turned off by any of the following (whichever comes first):
•
Completion of the variable time-on (set in 0.5 second increments to a maximum of
4.0 seconds)
•
A good decode
•
A Laser Off command from the host.
Level Trigger
When the Trigger signal is pulled to ground, the laser turns on. It turns off by any of the
following (whichever comes first):
•
Completion of the variable time-on (set in 0.5 second increments to a maximum of
4.0 seconds)
•
A good decode
•
The Trigger signal is pulled high.
No host download is permitted while the scanner is activated.
Summary of Contents for LS 1220
Page 2: ...LS 1220 Product Reference Guide ...
Page 3: ......
Page 4: ...LS 1220 Product Reference Guide 70 12072 03 Revision A January 2003 ...
Page 23: ...1 8 LS 1220 Product Reference Guide Figure 1 3 LS 1220 Connector ...
Page 33: ...2 10 LS 1220 Product Reference Guide ...
Page 71: ...8 14 LS 1220 Product Reference Guide Figure 8 1 Hardware Handshaking ...
Page 97: ...9 6 LS 1220 Product Reference Guide Code Lengths cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 105: ...9 14 LS 1220 Product Reference Guide Prefix Suffix Values cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 108: ...9 17 Parameter Menus UPC Security Zone cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 120: ...9 29 Parameter Menus Intercharacter Delay cont d 1 2 3 4 5 6 7 8 9 0 CANCEL ...
Page 133: ......
Page 134: ......