National Instruments 7340 PCI Benutzerhandbuch

relative position

destination or target position for motion specified with respect to the 
current location regardless of its value

relative position mode

position relative to current position

ribbon cable

flat cable in which the conductors are side by side

RPM

revolutions per minute—units for velocity

RPSPS or RPS/S

revolutions per second squared—units for acceleration and deceleration

RTR

Ready to Receive

s

seconds

servo

specifies an axis that controls a servo motor

stepper

specifies an axis that controls a stepper motor

stepper <1..4> 
Dir (CCW)

direction output or counter-clockwise direction control

stepper <1..4> 
Step (CW)

stepper pulse output or clockwise direction control

toggle

changing state from high to low, back to high, and so on

torque

force tending to produce rotation

trapezoidal profile

typical motion trajectory, where a motor accelerates up to the programmed 
velocity using the programmed acceleration, traverses at the programmed 
velocity, then decelerates at the programmed acceleration to the target 
position

trigger

any event that causes or starts some form of data capture

TTL

transistor-transistor logic