Ground mode is active when the aircraft is on the ground. It is a direct relationship between sidestick deflection and elevator deflection, without auto trim.
It automatically sets the trimmable horizontal stabilizer (THS) at 0° (inside the green band). A setting that the pilot enters manually to adjust for CG has priority for takeoff.
When the aircraft reaches 70 knots during the takeoff roll, the system reduces the maximum up elevator deflection from 30° to 20°, and the aircraft performs the rotation maneuver in direct law.
As soon as the aircraft becomes airborne, the system blends in the flight mode.(when a/c's RA> 50' for more than 5sec or pitch>8up+airborne)
When the aircraft is on the ground (in "on ground" mode), the sidestick commands the aileron and roll spoiler surface deflection. The amount of control surface deflection that results from a given amount of sidestick deflection depends upon aircraft speed. The pedals control rudder deflection through a direct mechanical linkage.