Watlow LogicPro - Manual (Page 294)

Glossary LogicPro User’s Guide
278 Watlow Anafaze Doc.# 28002-00 Rev 3.00
Select
The act of picking (or highlighting) which object you
want to manipulate in a GUI environment.
Selection
A highlighted (or picked) object. See Select.
Sequential Function Chart
Graphic way to organize Program using steps to illus-
trate specific portions of the process, actions to detail
what happens inside each step, and transitions to con-
nect the steps into a sequential or parallel flow.
Serial
A method of transmitting data one bit at a time. This
can be contrasted with “parallel” which transmits sev-
eral bits simultaneously.
Serial Port
An interface port that supports transmission of 1 bit at
a time. Most PCs are outfitted with serial ports for con-
necting most peripheral devices (a mouse or a mo-
dem). These ports conform to RS-232C or RS-422
standards.
Serial Process
A process in which steps happen in a sequence of one
step at a time.
SFC
An acronym for Sequential Function Charts.
Simulation
LogicPro feature which enables the user to verify the
operation of a Program before loading and running it
on the hardware controller.
Simulation Library
Similar to an Execution Library except that there is no
need for an I/O.
Simultaneous Transition
A component of SFC Programs that links and controls
execution of steps within the Program.
Standard Toolbar
Screen item below the menu bar displaying buttons
which execute commands.
State
A description of the logical time dependent existence
of a process.
Status Bar
Item located at the bottom of the screen displaying the
current Project and Resource name along with each
menu item’s information.
Step
An SFC Program unit which follows the instructions
and rules defined by its associated actions.
Switch
Electrical element used to open or complete a circuit as
desired.
Symbolic Variables
Identifier used to name variables associated with a
function block.
System Variable
Variables available at the system level, including sta-
tuses of I/O devices, etc.
Symbolic Name
Identifier used to name a variable.
T
Task
Control element which provides periodic and/or trig-
gered execution of a group of associated Program
units.
Tag
A variable.