No Read Message - Microscan MS-4 User Manual

No Read Message

No Read Message

Usage: Used in applications where the host needs serial verification that a symbol
has not been read and especially useful in new print verification.
Definition: When enabled, and if no symbol has been decoded before timeout or the
end of the read cycle, the No Read message will be transmitted to the
host.
No Read Message Mode
Serial Cmd: <K714,No Read message
Default: Enabled
Options: 0 = Disabled
Disabled
No message is output when a No Read condition occurs.
Enabled
The user defined No Read message is output whenever a No Read condition occurs.
Detailed No Read Message
Important: In the case where the conditions set in Bad Symbol/No Symbol Qualification
are met, then the Bad Symbol or No Symbol message output will override the No Read
Message or the Detailed No Read Message, if either is enabled.
Usage: Use this option to cover more detailed reasons for decode failures.
Definition: Outputs a No Read message followed by an additional message (an
Image Processing Results Code) indicating the reason a symbol failed to
decode.
For example, in the following output: "No Read d_1, E_2", d and E are symbology IDs for
Data Matrix and UPC respectively. The message means that Data Matrix and UPC are
enabled (and other symbologies are not), and that both failed to decode. The reason for
the failing Data Matrix is 1 and the reason for the failing UPC is 2. The first part of these
numbers (preceding the dot) is the relevant number and is interpreted here:
2D Symbols:
1. Failed to locate symbol (no finder pattern).
2. Failed to locate four corners or failed to qualify user defined dimensions (in pixels).
3. Failed to locate clock patterns or failed to qualify user defined orientation (0-359
degree).
4. Failed to validate clock patterns or failed to qualify user defined symbol size (clock
element count).
5. Failed to decode symbol.
7-6
status,No Read message>
1 = Enabled 2 = Detailed No Read Message
MS-4 Imager User's Manual