Rockwell Automation 2755 AtomScan Bar Code Reader - Manual (Page 53)

5–8 Configuring Your Reader
Publication 2755-6.9
Auxiliary Port Parameters
Auxiliary Port Parameters allow you to set communications
parameters between daisy-chained readers or between the reader and
an auxiliary monitor. An auxiliary monitor can be used to configure
the menus, send data to the host, and display data transmissions
originating from the host or reader. The auxiliary port cannot be
used in conjunction with RS-485 or RTS/CTS on the host port.
Note: The Aux Port baud rate should never exceed Host Port baud
rate or auxiliary port data could be lost.
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Mode.
Parameter Description
Disabled Data is not sent to the auxiliary monitor.
Transparent
Used to batch data from the auxiliary monitor to the host. The decoder buffers data
from the auxiliary monitor and displays the keyed data on the auxiliary monitor. The
decoder transmits auxiliary monitor data to the host when a label is scanned or a
carriage return is entered from the auxiliary monitor.
Transparent mode can work with all protocols.
Half-duplex
Operates exactly like Full-duplex except that the bar code data is displayed on the
auxiliary monitor screen at the same time the data is sent to the host.
Half-duplex mode can work with all protocols except polled protocols.
The auxiliary characters are echoed to the host without the optional inter-character
delay and without checking for the optional XON/XOFF status.
Full-duplex
All the auxiliary monitor data and bar code data is sent directly to the host. The bar
code data is not displayed on the auxiliary monitor screen.
Full-duplex mode can work with all protocols except polled protocols.
The auxiliary characters are echoed to the host without the optional inter-character
delay and without checking for the optional XON/XOFF status.
Slave
Allows a reader connected to the auxiliary port to input data replacing the no read
message.
In a daisy-chain setup, Slave Mode is enabled in the master reader and all slave
readers except the last one in line because the last one in line does not use the
auxiliary port pins.
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Baud Rate. Allows you to set the number of bits transmitted per
second.
•
Parity. Allows you to select an error detection routine in which
one data bit in each character is set to 1 or 0 so that the total
number of 1 bits in the data field is even or odd.
•
Stop Bits. Allows you to select the last one or two bits in each
character to indicate the end of the character.
•
Data Bits. Allows you to establish the total number of bits in
each character.