General

❏Always reset the scanner at the beginning and end of your programs

❏Use the ESC @ command to reset the scanner. This allows you to use the same program with different interfaces.

❏The time required for resetting differs by scanner model. Because of this, you should either disable your computer’s time-out or set the time-out clock to 30 seconds or more.

Parallel interface

❏If your program sends a command immediately after resetting the scanner and gets a BUSY signal, wait at least 1 ms and send the command again.

Option

❏Always send a FF command after you complete reading of a document from an ADF.

Using the ESC I command

❏Always check the scanner information at the beginning of your program. (This is not necessary if you provide a different driver for each scanner model.)

About the function level

❏Since higher-level scanners contain all the functionality of lower-level scanners, no errors occur when you use a low-level scanner program on a higher-level scanner.

❏When running a program designed for a high-level scanner on a lower-level scanner, make sure your program does not send any unsupported commands; otherwise, an error results.

2-56Command Usage