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Coupled commands can cause “Settings conflict” errors when the program
executes. When a coupled command is executed, the command setting is
evaluated by the digitizer processor. If the setting causes an illegal digitizer
configuration, a "Settings conflict" error occurs. The error message lists the
conflicting settings, and then reports the values set by the digitizer processor.
The "Comments" section of each command reference entry (Chapter 4)
indicates if a command is coupled, and if it is, what the coupling constraints
are.
How to Execute
Coupled Commands
To prevent possible "Settings conflict" errors, coupled commands must be
contiguous and executed in the same program statement. This is done by
placing the commands in the same program line, or for HP BASIC
programs, by suppressing the EOL terminator until the last (coupled)
command has been sent.
To send multiple commands in a single line or in a single statement, the
commands are linked with a semicolon (;) and a colon (:). This is illustrated
in the following lines:
OUTP:EXT1:STAT ON;:TRIG:SOUR EXT1;:OUTP:EXT1:STAT OFF
or
OUTP:EXT1:STAT ON;
:TRIG:SOUR EXT1;
:OUTP:EXT1:STAT OFF
Notice that the semicolon (;) and colon (:) link commands within different
subsystems. Only a semicolon (;) is required to link commands at the same
level within the same subsystem.
Sending the commands as shown prevents "Settings conflict" errors. The
command settings are not evaluated until the EOL terminator is received
after the last command. If these commands were sent individually (an EOL
terminator after each command), a "Settings conflict" error would occur
because of the coupling between OUTP:EXT1:STAT ON and TRIG:SOUR
EXT1.
Terminating
Commands
A SCPI command string is terminated with a line feed (LF) and/or with an
End Or Identify (EOI) message. The carriage return (CR) is ignored.
Suppressing the
End-Of-Line
Terminator
Suppressing the end-of-line (EOL) terminator on a command line allows
coupled commands to be sent on separate lines, yet as a single program
statement. In HP BASIC programs, the EOL terminator is suppressed by
Chapter 1 Gettin
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