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2-2 A-61124 March 1999
Enable scanning
The host must issue a SCSI Scan command (XX) to enable
scanning before documents can be transported through the
scanner. If scanning has not been enabled, the feeder and
transport system will not turn on.
Initiate polling
Initiate host system polling of the scanner to ensure scanned
document images are transferred from the image buffer to the
host system. Polling should continue until scanning is disabled.
Feed documents
Feed documents according to the instructions found in the
Kodak
Digital Science
Document Scanner 9500, User's Guide.
Disable scanning
Scanning is disabled to allow the host to download configuration/
setup changes between jobs and to handle certain types of
errors.
Scanning is disabled when one of the following conditions occur:
• The scanner is first powered on using the main power switch.
• A SCSI bus device Reset command is executed.
• An End-of-Job indicator is sent by the operator from the
scanner control panel.
• A scanner-unique End-of-Job command (GX) is issued by the
host computer.
• An error occurs requiring fault recovery.
• The scanner portion of the machine has not been calibrated.
NOTE: Once scanning has been disabled, documents cannot be
scanned until the host enables scanning by issuing a
SCSI Scan command.
Error handling
The scanner recognizes and reports a variety of error conditions .
Some errors are reported to either the host (via the SCSI
interface) or the scanner control panel, while others are reported
to both the host and the scanner control panel.
An error (via the SCSI interface) is defined as either a current
error or a deferred error.
A current error results from a problem in processing the current
SCSI command. This can include sending an invalid command,
trying to read from an empty image buffer, or an end-of-job
condition. Since one or more errors may be pending at any time,
current errors are reported first.
A deferred error results from an error condition within the
scanner, such as a document jam. Deferred errors that may have
occurred are reported after current errors.