Execution Commands
Execution commands tell the scanner to send back data to the computer.
Use execution commands to begin image data transfer from the scanner to the computer, to obtain the scanner ID and status, and to obtain information on the current scanner settings.
1. Start scanning (ESC G)
Upon receiving this command, the scanner begins scanning and sending image data to the computer. The scanner sends image data in data blocks that consist of one or more lines.
After the computer receives a complete data block, it should send an ACK code to the scanner to confirm receipt.
When the scanner receives the ACK code, it begins sending the next data block.
This process is repeated over and over to continue sending data. However, the computer should not send an ACK code after the final data block.
To determine the final data block, refer to the status information block at the beginning of each data block. See
page
ESC G and other commands
The ESC G command begins scanning based on the current scanner settings. Make sure you use the other commands to make your desired settings before sending the ESC G command.