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(5)
Error: From the host system to this scan engine: in host character time-out
TXD
(Host RXD)
RXD
(Host TXD)
RTS
(Host CTS)
CTS
(Host RTS)
1) The host system sets RTS signal to L-level for transmission.
2) This scan engine detects that CTS signal has been set to L-level and sets RTS signal to
L-level.
3) The host system, after confirming that CTS signal has been set to L-level, transmits
command data packets.
The host system suspends the packet transmission for once and sets RTS signal to
H-level. In this case, this scan engine does not detect that CTS signal has been set to
H-level so that RTS signal stays at L-level. Therefore, it will continue to be ready for the
data packet reception. However, the host system needs to restart transmission of data
packets within the setting value of "Host Character Time-out".
4) This scan engine takes time-out of the data packet receiption and sets back RTS signal
to H-level.
5) This scan engine sends out the NAK response.
Note: When ACK/NAK protocol is not selected, the sequence described in 6) shall not occur.
3)
t
2)
1)
4)
17
6)
5)
t: setting value of Host Character Time-out
OPTICON
Software Guide
MDL-1000/2000
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