Xantrex DC XG 850 User Manual download pdf (Page 231)

SCPI Conformance Information

M370078-01 A-5

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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Xantrex DC XG 850 User Manual Page 231