Metrologic Instruments Laser Scanner - Manual (Page 22)

18
V ISUAL I NDICATORS
There is a red LED and a green LED on the front of the MS7220. When the
scanner is on, the flashing or constant illumination of the LEDs indicates the
status of the current scan and the scanner.
No Red or Green LED
The LEDs will not be illuminated if the scanner is not receiving power
from the host or transformer.
Steady Green
When the laser is active, the green LED is illuminated. The green
LED will remain illuminated until the laser is deactivated.
During the power save mode, the laser will turn on and off. During
this period, the green LED remains illuminated.
Steady Green and Single Red Flash
When the scanner successfully reads a bar code, the red LED will
flash and the scanner will beep once. If the red LED does not flash
or the scanner does not beep once, then the bar code has not been
successfully read.
Steady Green and Steady Red
After a successful scan, the scanner transmits the data to the host
device. Some communication modes require that the host inform the
scanner when data is ready to be received. If the host is not ready to
accept the information, the scanner’s red LED will remain on until the
data can be transmitted.
Flashing Green then Flashing Red
This indicates the scanner is in program mode. A razzberry tone
indicates that an invalid bar code has been scanned in this mode.
or
If the unit is in sleep mode, each LED will flash once every 15
seconds.
Steady Red, Green off
This indicates the scanner may be waiting for communication from
the host.