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Code Description
CAN The printer detected an error such as an open
print head, and cannot process the request.
EOT The printer received a 9401 MPCL packet
from the host.
ESC The printer operator pressed .
ETX The printer operator pressed without
entering any data.
Using a Scanner in Interactive Mode
You must set the Auto Enter option depending on how you
enter data, as follows
Set Auto Enter to... To send scanned data...
Automatically Yes
Only after you press No
See the
Operator’s Handbook
for information on how to set
Auto Enter.
Example Printer/Host Dialog
Following is an example of what might happen during a dialog
between the printer and the host in the case of an employee
marking goods in a store.
HOST: Sends an exception packet ({E, "6, Scan
Shelf ID" }).
PRINTER: The operator scans the shelf label.
The printer sends the information back
to the host.
HOST: Searches a database for the item number
and retrieves the label format for the item.
Then, it sends an exception packet
({E, "6, Enter Quantity" }).
9401/9402 System Administrator’s Guide
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