Xantrex Technology XDC manual Using Minimum Maximum Queries, CALCURRentLEVel currentMINMAX

SCPI Command Reference

Using SCPI Commands

Using

Minimum and

Maximum

Using

Queries

•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 setpoint 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.

In the following example, Minimum and Maximum are offered as alternative choices to declaring a specific parameter value.

CAL:CURRent:LEVel {<current>MINMAX}

The string CAL:CURR:LEV MIN sets the current calibration level to the minimum model value.

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

Note If you send 2 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.

Terminating Every command string must end with a terminating <new line> character. An Characters IEEE-488 EOI (end-or-identify) can be used instead of a <new line> character. It is

also acceptable to use a <carriage return> followed by a <new line>. Terminating a command string always resets the SCPI command path to the root level.

Common The IEEE-488.2 standard includes a set of common commands for functions such as Commands reset and self-test. These common commands always start with an asterisk (*),

contain 4 or 5 characters, and may have one or more parameters. The command is always separated from the parameter by a blank space. Multiple commands sent in the same string are separated by a semi-colon (;). The following is an example of how 3 common commands can be sent together in the same string:

*OPC; *PSC Off; *TRG

196 Operating Manual for XDC Series Power Supply