The offset and scanning lengths (n1 to n4) should be integer values within the available range of the main scan length and sub scan length. The maximum main scan and sub scan lengths are determined by the current resolution and zoom settings, and the parameter range for the ESC A parameter falls within the values shown below.
0 ≤ n1 ≤ (maximum main scan length) - 8 0 ≤ n2 ≤ (maximum sub scan length) - 1
8 ≤ n3 ≤ (maximum main scan length) - n1 1 ≤ n4 ≤ (maximum sub scan length) - n2
The sum of the offset length and scanning length, either for the main scan and sub scan, should not exceed the maximum length determined by the resolution and zoom settings.
Caution:
c Thelengthofthem ain scan shouldalwaysbespecifiedin units of8dots,oran integerm ultipleof8.O therwise,acom m and erroroccursin thescanner.
Calculation of the maximum reading area
When the resolution is R dpi and the zoom is H%, the values for the maximum reading area are obtained with the following calculation.
Main scan : 8 × INT ((XL/Rmax) × (R × H/100)/8)
Sub scan : INT ((YL/Rmax) × (R × H/100))
XL = The maximum main scan length obtained with the ESC I command (in dots)
YL = The maximum sub scan length obtained with the ESC I command (in dots)
Rmax = The maximum resolution setting obtained with the ESC I command (in dpi)
Note:
INT(X) is a function that returns the integer of the given value X.
Command Reference