LabView Mindstorms - What does speed in seconds mean? I'm trying to set a motor to spin exactly at 60rpm, and I'm using LabView for Lego Mindstorms.

However, when reading the documentation for the move motor block, it says this:


  Power/Speed specifies the amount of power, from -100 to 100, with
  which you want to move the motors or the speed, in seconds, at which
  you want to move the motors. Use the polymorphic selector below the VI
  icon to specify whether you want to set the power or the speed at
  which the motors move.


Here's a screenshot of the docs:
http://puu.sh/l4FzP/c4d0b8faa7.png

So, what does the "the speed, in seconds, at which you want to move the motors." mean? I've tried setting it at one, and the motor barely moved.
A speed in second makes no sense to me. 

Are there more information about this motor, like to maximum rpm/power ? If so, maybe that the scale from -100 to 100 is some sort of percentage of max rpm/power, with the positives being one rotation direction and the negatives the other ?