Section 3: Configuration and Operation
GL Series Operator’s Manual Page 3-13
*USB Port
(This option only
appears if this is
the active port to
be used)
Buffer Size in K 1 to 16 16
This option configures the amount of memory allocated for the serial port buffer. The
range is 1-16 KB, in 1-KB increments.
NOTE: If you select a baud rate that is
19200 or greater, you may need to
increase the Buffer Size in K parameter
from the default to 16 KB to improve performance.
Timeout 10 sec 1 to 60
This item allows you to set the time that the
printer, when it has not received data from
its host, will begin to service all other host
ports looking for data to print.
*Serial Port
(This option only
appears if this is
the active port to
be used)
Baud Rate 600,1200,2400,4800,9
600,19200,38400,576
00,115200
19200 BAUD
The Baud Rate, Word Length,
Stop Bits and Parity settings
must match those that are set
on the host computer.
Word Length 7,8 8
Stop Bits 1,2 1
Parity None/Odd None
Data Protocol XON/XOFF,ETX/ ACK/
ACK/NAC/ Series1 1
Char/ Series1 2 Char/
DTR
XON/XOFF
XON / XOFF (factory default). The printer
controls the flow of communication from the
host by turning the transmission on and off.
In some situations, such as when the buffer
is full or the timing of signals is too slow or
too fast, the printer will tell the host to stop
transmission by sending an XOFF chara c-
ter. An XOFF character is sent when the
number of empty bytes in the buffer is less
than or equal to 25 percent of the buffer
size. If the host keeps sending data after an
XOFF is sent, the printer firmware will con-
tinue to send an XOFF for every 16 charac-
ters received. When cleared, the printer will
resume receiving data (XON). The data
does not have any End of Text codes; XON /
XOFF is a non-block protocol.
ETX / ACK. End of Text / Acknowledge. The
host controls the flow of communication to
the printer by sending a block of data and
ending the block with an End of Text (ETX)
signal. When the printer receives the ETX
signal, it will acknowledge the ETX , thereby
acknowledging it has received the entire
block of data.
ACK / NAK. ACK means acknowledge; the
device acknowledges it has accepted a
transmission. NAK means negative
acknowledge; the device did not receive the
transmission.
Buffer Size in K 1 to 16 16
This option configures the amount of mem-
ory allocated for the serial port buffer. The
range is 1-16 KB, in 1-KB increments.