Cuatom DC Sweep for Keithley 2400 via GPIB

Hello,

I already have an old VI that interface -among others- a Keithley 2400 via GPIB. There is already a DC sweep functionality for linear, log, Exp, inverse and Manual modes.

I would like to expand it and add "custom" sweep to do a rectangular waveform sweep.

Here is an image:

And the front panel:

The Keithly manual describes how commands can be used to implement the custom sweep, but it is not clear for me how these commands will be sent in LV.

ali8