Xantrex Technology XDC manual Voltslewstep 1, Voltslewint 100ms

Remote Operation

SCPI Commands for Digital Interfaces

Slew Rate The slew rate is calculated as a function of change in the output voltage and a given time interval. The maximum slew rate is 1% V rating/150us. The slew rate is saved upon power off and restored at power on. Output ON/OFF and shutdown are not affected by the programmable slew rate. These functions have a slew rate of 1%/20ms. For more information on setting slew rates, see “Slew Rate” on page 102.

The SCPI commands for changing the voltage slew rate are: :VOLT:SLEW:STEP {<slewrate-voltage> MAX MIN DEF}

where voltage-step has the units V, mV, etc. and the range is 0.1% to 5% of rated voltage. default step is 0.1% of rated output voltage.

:VOLT:SLEW:INTerval {<slewrate-interval> MAX MIN DEF} where time interval has the units s, ms, or us

and the range is 150 us to 1.5s default interval is 150us.

CAUTION

Check both the voltage step and the interval to ensure you get the required slew rate.

The combination must not exceed 1% V rating/150us. Though the software will attempt to achieve higher slew rates, it is limited to this value by hardware constraints. Manufacturer's recommendation is to keep the slew rate at or below the default value.

Example:

Set a slew rate of 100V/10s for a 100V-60A power supply.

This slew rate is 1V/0.1s, which is within the acceptable range.

Send the commands:

":VOLT:SLEW:STEP 1", and

":VOLT:SLEW:INT 100ms"

Release 3.0 141