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WorksheetsPLCC
Total questions: 35
Worksheet time: 18mins
A device that converts electrical signals into mechanical movement (e.g., motor, solenoid).
Thermistor
A unique location in memory where data is stored or retrieved.
Address
Signal inputs/outputs that vary continuously (e.g., 0–10V, 4–20mA) as opposed to digital ON/OFF signals.
Analog Input/Output
The smallest unit of data in computing, representing a binary 0 or 1.
Logic based on binary variables and operations such as AND, OR, NOT.
Boolean Logic
A system that manages, commands, directs, or regulates the behavior of other devices.
control system
The “brain” of the PLC, which processes instructions and logic.
A portion of PLC memory where input/output status, timers, counters, and other data are stored.
Data table
Signals that are either ON or OFF (1 or 0).
Digital Input/Output (I/O)
The process of sending a program from a computer to a PLC.
Downloading
Installing
Uploading
Transferring
A device that converts motion to an electrical signal used to determine position or speed.
Encoder
A communication protocol used in PLCs for real-time industrial automation.
An abnormal condition that may cause the PLC to stop or enter a safe state.
Fault
Permanent software programmed into a device like a PLC.
A graphical interface that allows an operator to interact with a PLC-controlled process.
The communication between the PLC and the external world (sensors and actuators).The communication between the PLC and the external world (sensors and actuators).
I/O (Input/Output)
A module that receives signals from sensors and sends them to the CPU.
Input Module
A programming language that represents logic in the form of electrical relay logic diagrams.
A circuit or logic condition that holds its state until reset.
Storage in the PLC for the program and data.
A communication protocol often used in industrial networks.
Terms used for switches or contacts, indicating default electrical states.
Sends control signals from the CPU to actuators such as motors or lights.
Output Module
A digital computer used for automation of electromechanical processes.
The cycle in which the PLC reads inputs, processes logic, and updates outputs.
Program Scan cycle
An electrically operated switch used to control circuits.
I/O located away from the main PLC unit and connected via communication protocols.
A device that detects changes in physical conditions and sends signals to the PLC.
A system that collects data from PLCs and displays it in real time.
Time it takes the PLC to complete one cycle of its operations.
Scan time
A function block or instruction that counts time and triggers an action after a set duration.
A symbolic name representing a memory location in modern PLC software.
The process of retrieving the PLC program and data to a computer.
A safety feature to ensure the PLC is operating properly; it resets the system if it malfunctions.
A data unit usually composed of 16 bits.
