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Explanation:
This command sets the reading resolution of the main scan and sub
scan.
n1 = Main scan resolution setting in dpi
n2 = Sub scan resolution setting in dpi
The settings available on each scanner model are listed in Appendix B.
The settings available can be checked with the identity data block that
is obtained with the ESC I (Request identity) command.
If a value other than an available setting is received, a command error
occurs, the command is ignored, and the current setting remains in
effect.
ESC R and other commands
When this command is received, the scanning area is reset to the
largest area possible with the currently selected resolution and zoom
values. Because of this, set the scanning area with the ESC A
command after the resolution (ESC R) and zoom (ESC H) settings
have been made.
See Chapter 2 for details on software control procedures and on the
use of the ESC R, ESC H, and ESC A commands. Also see the ESC
A command.
Note:
The parameters n1 and n2 are 2-byte values. The lower byte precedes
the higher byte. When the scanner accepts this command, the
scanning area is reset to the maximum value allowed with the current
resolution and zoom settings. Always set the resolution and zoom
before the scanning area is set.
3-26 Command Reference