PLC's Flashcards
What does PLC stand for?
Programable Logic Control
What usually holds all the components of the PLC?
The rack
What allows all of the components to be powered up?
The back plain
How do the input, output and CPU all share information?
The back plain
Where is the ladder diagram file stored in the PLC?
The CPU
What part of the PLC executes all outputs and process input information?
The CPU
<Local1:I:Data)> Is this an input or output?
Input
Is <Local1:I:Data)> discrete?
Yes
What terminal is <Local1:I:Data)>?
Zero
How do we program the PLC in lab?
A laptop
What does the VFD start parameter need to be when using the Push Button program in lab?
3 wire
What does the VFD speed parameter need to be when using the push button program in the lab?
0 -10 volts
What do you need to do when changing the PLC program if you want to change the program that is in the PLC?
Download to the PLC
What do the VFD start and speed parameters need to be set to when using the PLC program that runs through the HMI?
Comport
What brand is the compact logic controller?
Allen Bradley
What enables the controller to interface with a pushbutton?
Input Module/ Card
How many volts supply the PLC?
24 volts D.C
How many volts does the communications voltage run on?
5 volts
What is the CPU responsible for?
Receiving Inputs
Controlling the outputs
Performing logical decisions according to the program
What else is needed to make a basic system functional?
Mounting, Wiring, Programming
What is the process variable?
It is the main point of the system that the set point is trying to maintain
What is known as the EYE of the system that provides a feedback of signals of the controlled variable?
Measurement Device
What is the set point?
The set point is the designated input value applied to the control loop
In a control system what alters energy into a mechanical motion?
The Actuator
