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130 www.emersonct.com SM-EZMotion Module User Guide
Global Where Am I
PowerTools feature that indicates which line of which
user program is executing.
Home Routine
The home provides motion in applications in which the
axis must precisely align with some part of a machine.
Hysteresis
For a system with an analog input, the output tends to
maintain its current value until the input level changes
past the point that set the current output value. The
difference in response of a system to an increasing input
signal versus a decreasing input signal.
I/O
Input/Output. The reception and transmission of
information between control devices. In modern control
systems, I/O has two distinct forms: switches, relays,
etc., which are in either an on or off state, or analog
signals that are continuous in nature generally depicting
values for speed, temperature, flow, etc.
Index
An index is a complete motion sequence (defined motion
profile) that moves the motor a specific incremental
distance or to an absolute position.
Inertia
The property of an object to resist changes in rotary
velocity unless acted upon by an outside force. Higher
inertia objects require larger torque to accelerate and
decelerate. Inertia is dependent upon the mass and
shape of the object.
Input Function
See destination. A function (i.e., Stop, Preset) that may
be assigned to an input line. In PowerTools Pro, the
input function is connected to the action through click
and drag operations in PowerTools Software on the
Assignment View.
Input Line
The terminals of a device or circuit to which energy is
applied.
Jog
A jog produces rotation of the motor at controlled
velocities in a positive or negative direction.
Least Significant Bit
The bit in a binary number that is the least important or
having the least weight.
LED
Light Emitting Diode used on the front display of drives
and function modules.
List Box
In a dialog box, a list box is an area in which the user can
choose among a list of items, such as files, directories,
printers or the like.
mA
Milliamp, which is 1/1000th of an Ampere.
MB
Mega-byte.
MODBUS
Communication Protocol by Modicon. The drives follows
the Modbus specification outlined in the Modicon
Modbus Protocol Reference Manual, PI-MBNS-300
Revision G, November 1994.
Module
SM-EZMotion Module
Most Significant Bit
The bit in a binary number that is the most important or
that has the most weight.
ms
Millisecond, which is 1/1000th of a second.
NVM
Non-Volatile Memory. NVM stores specifically defined
variables as the variables dynamically change. It is used
to store changes through a power loss.
NTC
Negative Temperature Resistor
Option Button
See
Radio Button.
Opto-isolated
A method of sending a signal from one piece of
equipment to another without the usual requirement of
common ground potentials. The signal is transmitted
optically with a light source (usually a Light Emitting
Diode) and a light sensor (usually a photosensitive
transistor). These optical components provide electrical
isolation.
Output Function
See source. The terminals at which energy is taken from
a circuit or device.
Output Line
The actual transistor or relay controlled output signal.
Parameters
User read only or read/write parameters that indicate
and control the drive operation. These variables
generally hold numerical data defined in the Setup