Monarch 9474, Programmer'S Manual

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I n p u t C h a r a c t e r i s t i c s
Below are the input characteristics for communications. The
defaults are shown in bold print.
N
Asynchronous
N
Full duplex
N
Selectable options:
Baud rate 110, 300, 600, 1200, 2400 , 4800, 9600
Parity No parity , Odd, Even
Data flow Xon/Xoff , Data Terminal Ready (DTR)
Data bits Seven (7) or eight (8)
Stop bits One (1) or two (2)
Modify these communication settings on your printer as necessary
to match the settings on your host. See "Setting Communication
Values" for more information.
There are three main buffers: batch, format, and graphic. The
printer also has a 1024 byte input buffer which holds data until it
is processed into the respective buffer(s).
D a t a F l o w C o n t r o l
The printer uses Xon/Xoff or data terminal ready (DTR) for data
flow control. DTR flow control is usually required if you are using
an IBM-PC, unless the PC has a special Xon-Xoff program.
In DTR mode, the printer activates DTR when the printer can
accept more data from the host and deactivates when the
printer’s receive buffer is nearly full. In Xon/Xoff Mode, the
printer sends the Xon character when the printer can accept more
data and sends Xoff when the printer buffer is nearly full.
In either mode, once the printer has indicated that its buffer is
nearly full (by sending Xoff or deactivating DTR), up to 134
additional characters may be accepted without losing any data.
2-2 Communication Requirements