14
3-6 RS-232 interface
Flow control:
None-The communication only uses TxD and RxD signals without any hardware or software
handshaking protocol.
RTS/CTS- If the platform wants to send the barcode data to host computer, it will issue the RTS signal
first, wait for the CTS signal from the host computer, and then perform the normal data communication.
If there is no replied CTS signal from the host computer after the timeout duration, the platform will
issue an error indication. By setting (Host idle: Low RTS) or (Host idle: High RTS), the platform can
be set to match the Serial Host RTS line.
XON/XOFF- An XOFF character turns the platform transmission off until the platform receives an XON
character.
ACK/NAK- After transmitting data, the platform expects either an ACK (acknowledge) or NAK (not
acknowledge) response from the host. When a NAK is received, the platform transmits the same
data again and waits for either an ACK or NAK. After three unsuccessful attempts to send data when
NAKs are received, the platform issues an error indication and discards the data.
Inter-character delay: This delay is inserted after each data character transmitted.
Response delay: This delay is used for serial communication of the platform when it waits for a
handshaking acknowledgment from the host.
Multiple-scan setting
Single-scan setting
Option barcode
Option
Alpha. entry
Flow control
None
00*
*
RTS/CTS
(Host idle: Low RTS)
01
RTS/CTS
(Host idle: High RTS)
02
XON/XOFF
03
ACK/NAK
04
Inter-character delay
0 ms
00*
*
5 ms
01
10 ms
02
20 ms
03
40 ms
04
80 ms
05
