Scanner Interface
∙ ALD (Automatic Length Detection): Byte 3
The ALD bit specifies detected paper length replaces length value which has specified in Length field in Set Window Parameter. When this bit is 0, automatic length detection is disabled. When this bit is 1, automatic length detection is enabled. After the scanning, detected length (transferred line number) is set in Detected Paper Length field of Pixel Size Data.
Example 1:
Width
Length
Image data transfer is completed at this line.
For the READ command, CHECK CONDITION is returned with ILI=0, if TL ≠ 0 like as image data shrink in compression.
Example 2:
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If Window region is started outside the paper, no image data is returned. For the READ command, CHECK CONDITION is returned and reading sequence terminates extraordinarily.
Appendix