Xantrex XTR 33-25, Operating Manual

Page: 231 / 286

SCPI Conformance Information
M370046-01 A-5
A
The following punctuation is not sent with the command string:
•
Braces ({ }), or curly brackets, identify a selection of choices. Choose
one of the enclosed values.
• Vertical bars, or pipes, ( | ) can be read as “or” and is used to separate
the choices found within the braces.
• Angle brackets ( < > ) identify where specific values must be entered
for a parameter. For example, in the example at the top of the page,
the parameter <current> appears in the command string. To set the
current set point to 0.1A, the syntax is
CAL:CURR:LEV 0.1
.
• Square brackets ( [ ] ) identify optional parameters. If an optional
parameter is not sent with the command string, a default parameter is
sent in its place.
Using Minimum and Maximum
In the following example, Minimum and Maximum are offered as
alternative choices to declaring a specific parameter value.
CAL:CURRent:LEVel {<current>|MIN|MAX}
The string
CAL:CURR:LEV MIN
sets the current calibration level to the
minimum model value.
Using Queries
A question mark lets you query the present value for most parameters. For
example, to query the current calibration state use:
CAL:SEC:STAT?
You can also use the following to query minimum and maximum allowed
values for most parameters:
:VOLT? MIN
:VOLT? MAX
Important: If you send two queries, it is best to read and respond to the first
response before trying to read the second. Otherwise, you may receive an
incomplete first response followed by a complete second response. To avoid this,
you can either wait for and read the first response before sending the second
query, or send a device clear message before sending the second query.
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