A-61580 November 2007
2-3
Enable scanning
The host must issue a Scan command 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.
For more information see the sections entitled, “Controlling image
transfer order” and “Image header information” later in this chapter.
Feed documents
Feed documents according to the instructions found in the
Kodak
i1800
Series Scanners 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 also disabled when one of the following conditions occur:
• The scanner is first powered on using the power switch.
• An End-of-Job indicator is sent by the operator from the operator
control panel touchscreen.
• A scanner-unique End-of-Job command is issued by the host
computer.
• An error occurs requiring fault recovery.
NOTE: When scanning is disabled, documents cannot be scanned until
the host enables scanning.
Error handling
The scanner recognizes and reports a variety of error conditions.
Some errors are reported to either the host or the touchscreen, while
others are reported to both the host and the touchscreen.
An error is defined as either a current or deferred error.
A current error results from a problem in processing the current
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.
NOTE: Low level commands and information will be handled by your
device driver. The following information is provided for reference
only.
When an error occurs, the host will receive a Check Condition Status.
This indicates to the host that there may be one current error and
potentially one or more deferred errors. The host must follow a Check
Condition Status with a Request Sense command. The Sense data will
indicate the type of error that has occurred.
