
Glossary
175
A control system in which operations are carried out according to pro-
grammed instructions, but in which feedback is not provided for automatic
adjustments.
A parameter used to correct the origin from the position determined accord-
ing to the origin input signal.
A signal input to indicate when the position is near the origin to enable shift-
ing to a lower speed.
The region near the origin. When positioning enters this region, a proximity
switch may output a signal for deceleration.
The point which is designated as 0 at any given time.
The first five of the ten IR words allocated to each Position Control Unit as
refresh areas.
User-defined codes output following completion of a positioning action.
Data which determines limits and other conditions under which an operation
will be carried out. The Position Control Unit has both general parameters
and parameters specific to individual positioning actions.
A positioning action completion code that creates a pause after reaching the
target position for the positioning action and then automatically begins the
next positioning action. The length of the pause is specified by the dwell time.
The fundamental unit of positioning. A positioning action is defined by its
completion code, dwell time, output code, speed number, and target position.
These actions are generally referred to by number and completion code. For
example, “#6, continuous” indicates positioning action #6 with a continuous
completion code.
The numeric value in pulses defined as being the ‘location’ of the positioning
system at any one point in time. The present position is not absolute, but
rather can be defined or redefined as required by positioning operations.
A low speed at which positioning is executed near the origin.
The distance moved by an object driven by a motor divided by the number of
pulses required for that movement.
A series of pulses output together.
Discrete signals sent at a certain rate. The Position Control Unit outputs
pulses, each of which designates a certain amount of movement. Such
pulses are converted to an equivalent control voltage in actual positioning.
The Unit in a Remote I/O System through which signals are sent to all other
Remote I/O Units. The Remote I/O Master Unit is mounted either to a CPU
Rack or to an Expansion I/O Rack connected to the CPU Rack.
A Link System in which remote I/O points are controlled through a Master
mounted to a CPU Rack or an Expansion I/O Rack connected to the CPU
Rack.
open-loop system
origin compensation
origin proximity signal
origin proximity
origin
OUT refresh area
output code
parameters
pause (completion)
positioning action
present position
proximity speed
pulse rate
pulse train
pulses
Remote I/O Master Unit
Remote I/O System