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Digital Communication Interface
Interface Commands
10.2 Interface Commands
The various commands for accessing the calibrator functions via the digital in terfaces
are listed in this section (see Table 5). These commands are used with the RS-232
serial interface. The commands are terminated with a carriage-re turn character. The
interface makes no distinction between upper and lower case letters, hence either may
be used. Commands may be abbreviated to the minimum number of letters which
determines a unique command. A command may be used to either set a parameter or
display a parameter depending on whether or not a value is sent with the command
following a “=” character. For example “s”<CR> will return the current set-point and
“s=150.0”<CR> will set the set-point to 150.0 degrees.
In the following list of commands, characters or data within brackets, “[” and “]”, are
optional for the command. A slash, “/”, denotes alternate characters or data. Numeric
data, denoted by “n”, may be entered in decimal or exponential notation. Characters
are shown in lower case although upper case may be used. Spaces may be added
within command strings and will simply be ignored. Backspace (BS, ASCII 8) may be
used to erase the previous character. A termi nating CR is implied with all commands.
