Rion NL-42, Interface Manual, Page: 30 / 72

22
Command
Command types
There are two types of commands: setting commands and request com-
mands.
Setting command
This type of command serves for changing the sound level meter status or
measurement parameters. Only some commands of this type will produce a
response from the sound level meter. The response consists of status informa-
tion returned after the setting command has been processed.
Request command
This type of command serves for getting information about unit settings and
for obtaining measurement data including display data and stored data. The
sound level meter returns the requested data.
Command format
Setting command
Command = “$” + “command name” + “,” + “parameter” + [CR] + [LF]
The basic components of a setting command are the command name and the
parameter. “$” at the beginning represents the processing state of the com-
mand and is automatically displayed. During the processing of the command,
“$” is not displayed and does not accept the command input. A comma is
used as delimiter between the command name and parameter, and the setting
command is terminated by a [CR]+[LF] (carriage line feed). The
setting command uses the CSV format.
Prohibited items
• Spaces in a command name may not be omitted.
• Spaces in a command name may not be doubled.
• The “,” (comma) after the command name may not be omitted.
• Japanese full-width characters are not allowed.