Hi Insulator,
I was looking through the user manual for you instrument and it looks like the answer to your questions is on page 88 and 89. The link to the manual is:
Basically, you will just use a VISA write and VISA read with the commands from the manual. Use the commands they give you for Remote Interface Operation.
For your application, you will use the "ROUT:CHAN:DELAY" function.
Scott G.
AE Specialist
National Instruments