Stepper Motor Question - Easy for the PROS to answer

Hello Folks,


Can you visit http://www.slosyn.com/ssstepmotors_stndrdnema34.html
and look at the table labled

M09 Series 90MM Frame Size Model (NEMA 34) RATINGS and SPECIFICATIONS

In the colum labled

Minimum Holding Torque Oz-In (Ncm)

there is two sub colums. On labled 2 On and the Other Labeld 1 ON.

Can you clarify what this means? Does it refer to number of coils
powered? Aside from that I can not figure it out. There is a
subsantioal diffrence in torque based on these two colums.

Hope you can help

Thanks,

Shawn