Data Output Message Flow - Microscan MS-820 User Manual

Data Output Message Flow

Data Output Message Flow

The following flow chart shows the logic paths followed for Noread, Bad Symbol, and
No Symbol outputs.
Start of
Read Cycle
Scans until end
of read cycle
Does the
scanner decode the
symbol?
No
Is Symbol
Detect enabled?
Yes
Is
Transition
Counter Threshold
met?
No
MS-820 Industrial Bar Code Scanner User's Manual
6-6
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Notes:
When Symbol Detect is enabled, the scanner will test for a
minimum number of bar and space transitions as set in
Transition Counter Threshold. If that minimum thresh-
old is met, a Bad Symbol message is sent; otherwise a No
Symbol message is sent.
If conditions for a Bad Symbol, No Symbol, or No Object
messages are met but the corresponding output is not
enabled, a Noread message will be output.
Yes
Noread
message sent
No
(if enabled)
Bad Symbol
message sent
Yes
(if enabled)
No Symbol
message sent
(if enabled)
read cycle
End of