Technical information

190
230V FX Series Positioning Drive Reference Manual
Ringing
Oscillation of a system following sudden change in state.
Rise Time
The time required for a signal to rise from 10 percent of its final value to 90 percent of its final value with a
step input applied.
RMS Current
Root Mean Squared current. In an intermittent duty cycle application, the RMS current is equal to the value
of steady state current which would produce the equivalent heating over a long period of time.
RMS Torque
Root Mean Squared torque. For an intermittent duty cycle application, the RMS torque is equal to the steady
state torque which would produce the equivalent heating over a long period of time.
RS-232C
A data communications standard that encodes a string of information on a single line in a time sequential
format. The standard specifies the proper voltages and timing requirements so that different manufacturer’s
devices are compatible.
Robot
A re-programmable multifunctional manipulator designed to move material, parts, tools, or specialized
devices through variable programmed motions for the performance of a variety of tasks.
Robot Control
A computer-based motion control device to control the servo-axis motion of a robot.
Rotor
The rotating part of a magnetic structure. In a motor, the rotor is connected to the motor shaft.
Serial Port
A digital data communications port configured with a minimum number of signal lines. This is achieved by
passing binary information signals as a time series of “1”s and “0”s on a single line.
Servo Amplifier/Servo Drive
An electronic device which produces the winding current for a servo motor. The amplifier converts a low
level control signal into high voltage and current levels to produce torque in the motor.
Servo System
An automatic feedback control system for mechanical motion in which the controlled or output quantity is
position, velocity, or acceleration. Servo systems are closed loop systems.
Settling Time
The time required for a system parameter to stop oscillating or ringing and reach its final value.
Shunt Resistor
Device located in a servo-amplifier for controlling regenerative energy generated when braking a motor.
This device dissipates or “dumps” the kinetic energy as heat.
Single Point Ground
The common connection point for signal grounds in a control wiring environment. Also known as a “Star”
ground.