
8-4 MS-820 Industrial Bar Code Scanner User’s Manual
8–Outputs
Message Output
The following flow chart explains the logic paths taken for Noread, Bad Bar Code
and No Bar Code outputs.
Figure 8-1 Output Message Flow
Start of
read cycle
Scans until end
of read cycle
Does the
scanner decode
the symbol?
Is
Transition Sample
Threshold
met?
Scanner
outputs the
No Label
message
(if enabled)
Scanner
sends the
Bad Bar Code
message
(if enabled)
Yes
No
Is
Transition
Sample Status
enabled?
Scanner
send Noread
message
(if enabled)
No
Yes
No
Yes
Scanner
sends the
No Bar Code
message
(if enabled)
Note: When Transition Counter Status is
enabled, the scanner will test for a minimum
number of bar and space transitions. If that
minimum threshold is met, a Bad Bar Code
message is sent; otherwise a No Bar Code
message is sent.
Start of
read cycle
End of
read cycle
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