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B. SERIAL COMMANDS
Start any of the available communications programs, such as PROCOMM
or
TERMINAL on your computer. Make sure the communications program is set to
match the ENERAC’s protocol listed above. You may need to use a null modem if
you have trouble communicating.
The ENERAC is capable of responding to commands and requests for data sent
from the remote computer. For this purpose, it has a vocabulary of commands that
the computer can send and to which the ENERAC will respond. There are two
types of commands: those designed for general use, and those reserved for
technical purposes in order to determine from remote locations the performance of
the instrument.
All commands consist of a four-letter word (these are usually abbreviations of the
complete word). If the command is followed by a question mark it means that it is
a request for information (i.e. it will cause the ENERAC to respond to the
command by sending to its output port the specific information requested). If a
command doesn’t contain a quotation mark it will cause the ENERAC to store the
data sent with the command, or take some other action, such as erasing a specific
data buffer. This is the way to reprogram the instrument from a remote location.
This feature makes remote control possible, as well as the introduction of new
fuels or parameters, or even the introduction of additional features and
improvements without requiring the return of the instrument to the factory.
A list of the available commands intended for general use follows.
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