Datalogic PowerScan Series, Руководство по продукции

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RS-232 PARAMETERS
PRODUCT REFERENCE GUIDE
315
RS-232 PARAMETERS
RS-232 ONLY
Baud Rate
Baud rate is the number of bits of data transmitted per second. Set the reader's baud
rate to match the baud rate setting of the host device. With an improper baud rate set -
ting, data may not reach the host correctly.
Data Bits
This parameter allows the reader to interface with devices requiring a 7-bit or 8-bit
ASCII protocol for sending and receiving data.
Stop Bits
The stop bit(s) at the end of each transmitted character marks the end of transmission
of one character and prepares the receiving device for the next character in the serial
data stream. The number of stop bits selected (one or two) depends on the number the
receiving terminal is programmed to accommodate. Set the number of stop bits to
match host device requirements.
Parity
This feature specifies parity required for sending and receiving data. A parity check bit is
the most significant bit of each ASCII coded character. Select the parity type according
to host device requirements.
• Select None when no parity bit is required.
• Select Odd parity and the parity bit value is set to 0 or 1, based on data, to ensure
that an odd number of 1 bits are contained in the coded character.
• Select Even parity and the parity bit value is set to 0 or 1, based on data, to ensure
that an even number of 1 bits are contained in the coded character.
Handshaking Control
The data interface consists of an RS-232 port designed to operate either with or without
the hardware handshaking lines, Request to Send (RTS), and Clear to Send (CTS). Hand -
shaking Control includes the following options:
• RTS — RTS is asserted during transmissions. CTS is ignored.
• RTS/CTS — RTS is asserted during transmissions. CTS gates transmissions.
• RTS/XON/XOFF — RTS is asserted during transmissions. CTS is ignored. XON and
XOFF gate transmissions.
• RTS On/CTS — RTS is always asserted. CTS gates transmissions.
• RTS/CTS Scan Control — RTS is asserted during transmissions. CTS gates transmis
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sions and controls enable and disable state of reader.