Serial Communications Page 7-
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Command Mode If a protocol is enabled, the 2010D
serial port automatically switches to
command mode any time a start of
command character is received (an "@",
for the ML protocol). The port remains
in command mode until terminal mode is
selected or the system is reset.
Prerequisites
In order to communicate with the Model 2010D remotely,
the following equipment will be needed:
A computer with at least one serial RS-232 port capable of
running terminal emulation software. For a remote telephone
connection, an internal or external Hayes compatible modem
will also be necessary.
For terminal mode communications, a terminal emulation program
capable of emulating ANSI terminals, such as Hyperterminal.
If the unit is to be accessed via telephone lines, two modems
will be necessary: one for the computer and one for the Model
2010D. A Hayes compatible external modem is recommended for
the Model 2010D. The baud rate should be at least 2400,
however 9600 baud or greater is highly recommended. The modem
must be capable of retaining setup information, either by
saving to non-volatile memory or by setting DIP switches.
An RS-232 cable will be needed to connect the Model 2010D to
the computer or modem. The type of cable used will depend on
whether a computer or modem is to be attached. Since the
Model 2010D's COM1 and COM2 connectors adhere to the 9 pin
standards established for personal computers, both types of
cables are readily available. Tables 4-6 and 4-7 list wiring
connections for these cables.
For direct computer connection, a null modem cable will be
needed. The Model 2010D end of the cable must have a 9 pin
female connector. The computer end should be either a 9 pin
or 25 pin female connector, depending on the computer's
connector type. An ordinary 9 pin female to 25 pin male modem
serial cable will be needed for a modem connection.
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