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2. Inquiry about set value of data setting command
The data setting commands 1 to 18 shown above also serve as
set value inquiry commands if question marks "?" are added to
the end of the commands. (The output may be in the off status
actually, depending on pressing the OUTPUT OFF key or an error
in the power supply unit.)
The format of the response is the same as that of the setting
command and parameter. However, the command (with no
parameter) is only returned if the parameter is not set in that
command. When SELECT 0 is specified for commands 2 to 7,
the returned command has no parameter. Specify SELECT 1 or
SELECT 2 and make an inquiry for each channel.
NOTE: If data is requested (by specifying the talker) without executing
a data request command, the GP-600B sends characters
"ERROR".
