Opticon
OPR 2001
Specifications Manual
b)BUSY/READY
The scanner and the host computer notify each other of their state and whether they can receive data with BUSY/READY through an RTS line. They can communicate state to each other through a CTS line when connected as in the following figure.
Figure 12: Busy/Ready communication
The scanner stays ON (is able to receive data) except during certain parts of the process, such as receiving data (buzzer command execution), transmitting data, and menu processing. The scanner checks the CTS line before transmitting data. When it is ON, the scanner transmits data. When it is OFF, the scanner waits for it to turn ON within a set time. The scanner will abort transmission with an error indication (buzzer) when the CTS line is not ON within a specified period. The Flow Control
Flow Control Time Out | Menu/Command |
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Indefinitely | I0 |
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100 ms | I1 |
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200 ms | I2 |
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400 ms | I3 |
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Figure 13: Cannot receive command
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