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b) BUSY / READY
The scanner and the host system notify each other if they are able to receive data
(BUSY/READY) via their RTS line. When they are connected as shown in the figure below,
the CTS line can be used to check if the other side is busy (off) or ready to receive data (on).
The scanner's RTS is normally on (so ready to receive data) except during the processing of
received data, while transmitting data, and while it is busy processing menu labels. When the
scanner wants to send data, it first has to check if its CTS line is on (to be sure that the host
is ready to receive data) When the CTS line is off, the scanner does not send the data but
waits for a specific timeout period until the CTS line is tuned on. When the CTS line is not
turned on within the time specified, the data transmission will be aborted. The default is
"Indefinitely" (I0).
Flow Control Time Out
Indefinitely
100 msec
200 msec
400 msec
Figure 11: BUSY/READY
Figure 12: Cannot Receive Command
18
NLB / RLB-1000
Specifications Manual
Menu / Command
I0
I1
I2
I3
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