Xantrex Technology XMP 2600 - Manual (Page 82)

Advanced features Output ramping
A ramp can be either a down-ramp (negative slope) or an up-ramp (positive slope)
but it cannot change the polarity of the Power Module’s output.
Output ramping can be as fast as a single output step occurring within 6mS of
initiation (limited by the module’s rise/fall time) or it can be a gradual process
lasting as long as 6 Minutes, 33 Seconds and 210 mili-seconds.
While ramping its output, the Power Module uses, for the ramp calculations, a
resolution much higher than the output programming resolution. This fact ensures
that no calculation-induced errors will affect the produced output ramp.
Ramping must not be combined with any foldback mode other than
“no foldback” (voltage/current operating mode).
Output
ramping
setup
To produce a ramp, the XMP 2600 needs to know the start value, the ramp’s
duration and the desired end value. Using these values, the XMP 2600 calculates the
data needed for the Power Module to produce a precise up or down ramp.
When the parameters for the ramp operation are being programmed, the XMP 2600
needs to know it should calculate the data needed by the Power Module to generate
the ramp. Therefore the ramp mode must be selected before the parameters for the
ramp operation are being programmed.
The following sequence of operations demonstrates the proper way to program the
XMP 2600 to produce a ramp:
Set initial state.
Select type of ramp and duration.
Arm and set final state.
The same procedure can be used to produce a voltage up-ramp, voltage down-ramp
or a current up or down ramp.
Set initial state
First of all you need to set the voltage and current the ramp operation will start from.
To set the initial state proceed as follows:
Make sure outputs are globally enabled. If the ON indicator is
extinguished, make sure the XMP is displaying status and press the
OUT key to globally enable all the outputs.
Select the power module to program (see: first operation steps chapter
for details).
Select the LOAD, OUT or SET parameter (use the up / down selection
keys) and enter programming mode (press the SET key) or enter
programming mode and then select the SET parameter (see:
Programming power module parameters in the basic operation chapter).
Program the power module for the initial voltage and current.
Make sure that no foldback is selected.
Turn the power module’s output on by pressing the OUT key.
Select type of ramp and duration (trigger mechanism)
Select the TRIG parameter (move the cursor to the parameter’s name
and use the up / down selection keys).
XMP 2600 User’s Guide rev. 1.0 63