Rockwell Automation SA3100 AutoMax Distributed Power System - Manual (Page 48)

A-4 AutoMax Distributed Power System Overview
continuous conduction: the point at which there is an uninterrupted flow of current to
the motor.
control algorithm: In general, software that regulates a quantity such as voltage,
power, speed, etc., at a set value or between certain close limits. Also called regulator.
converter: used generally to mean a machine or device for changing AC to DC, or
vice versa, or from one frequency to another. See also rectifier.
core (fiber-optic cabling): the center of a cable which carries optical signals. The core
has a higher refractive index than the cladding.
CURRENT (in BASIC language LOCAL statement): when shown in uppercase, this
refers to the parameter in the Local Tunable BASIC statement. The CURRENT value
is the value the Local Tunable variable will have for the next scan.
current limiting: an electronic method of limiting the maximum current applied to the
motor; can also be preset as a protective measure to protect both the motor and
control from extended overloads.
current minor loop (CML): See loop.
D/A converter: digital to analog converter; a circuit which converts a digital word
(series of bits) to an analog voltage or current.
damping: the reduction or suppression of the oscillation of a system.
dead time: the time interval between initiation of an input and the start of the resulting
response.
decibel (dB): a unit for measuring the relative power of a signal.
di/dt: the change in current versus a change in time.
dielectric: a non-metallic, non-conducting substance; insulation.
discontinuous conduction: the region in which current to the motor does not flow
continuously, but flows intermittently.
dispersion (fiber-optic cabling): the spreading of optical pulses in a single-mode fiber.
DPS: Distributed Power System.
drive: the means or apparatus for transmitting motion to a machine or machine part;
for Distributed Power Systems, the combination of a PMI and a Power Module.
drive regulator group: sometimes used to mean DCS Drive Regulator. This consists
of the Drive Controller module (B/M O-57406), Drive Analog I/O module (B/M O-
57405), Drive Digital I/O module (B/M O-57401), and Power Module Interface module
(B/M O-57408).
D/S (Dimension Sheet): drawings providing outline dimensions, mounting
information, and other mechanical information about a part or an assembly.