Industrial Control & PLC

Question 1

PLC

Answer 1

Programmable Logic Controller

Question 2

CPU

Answer 2

Central Processing Unit

Question 3

SPC

Answer 3

Statistical Process Control

Question 4

PID

Answer 4

Proportional, Integral, Derivative

Question 5

PAC

Answer 5

Programmable Automation Controller

Question 6

DI

Answer 6

Digital Input Module

Question 7

DQ

Answer 7

Digital Output Module

Answer 8

IEC61131

Question 9

DRAM

Answer 9

Data Memory

Question 10

Programming Device

Question 11

ROM

Answer 11

Read-Only Memory

Question 12

Non-Volatile Program Back-up Memory

Question 13

RAM

Answer 13

Random Access Memory

Question 14

1 Byte

Answer 14

8 Bits

Question 15

4 Logical Functions

Answer 15

YES, NOT, AND, OR

Question 16

AI

Answer 16

Analogue Input Module

Question 17

Normally Open Contact

Question 18

AQ

Answer 18

Analogue Output Module

Question 19

SCL / ST

Answer 19

Structured Control Language / Structured Text

Question 20

Self-Latching

Answer 20

Using an output Tag as an input for itself; the result being a continuous feedback loop, keeping the tag in operation.

Question 21

IL

Answer 21

Instruction List Language

Question 22

FBD

Answer 22

Function Block Diagram

Question 23

SR

Answer 23

Set / Reset —- Flip Flop

Question 24

D-Sub

Answer 24

D-Subminiature is a common, now outdated, computer connector

Question 25

Scaling

Answer 25

The process of converting analogue data (e.g. 0 to 100 degrees celsius) into digital data

Question 26

Home Position

Answer 26

The resting position of a machine, before any action takes place

Question 27

Actuator

Answer 27

An actuator is a component of a machine that is responsible for moving and controlling a mechanism or system, for example by opening a valve. In simple terms, it is a “mover”. An actuator requires a control signal and a source of energy.

Question 28

Hydraulic

Answer 28

Denoting or relating to a liquid moving in a confined space under pressure.

Question 29

Pnuematic

Answer 29

Containing or operated by air or gas under pressure.

Question 30

DCV

Answer 30

Directional Control Valve

Question 31

SFC / Graphical Language

Answer 31

Sequential Function Chart

Question 32

Discrete Sensor

Answer 32

A sensor which returns an ON/OFF state; 0 or 1.

Question 33

Mixer Pressure Vessel

Answer 33

Equipped with relevant sensors (temperature, pressure, level), this vessel mixes together ingredients at high temperature

Question 34

Transducer

Answer 34

A transducer is a device that converts energy from one form to another. Usually a transducer converts a signal in one form of energy to a signal in another.

Question 35

Transducer and Transmitter

Answer 35

For Analogue Sensors, Transducer and Transmitter are often in one unit

Question 36

HMI

Answer 36

A Human-Machine Interface (HMI) is a user interface or dashboard that connects a person to a machine, system, or device. While the term can technically be applied to any screen that allows a user to interact with a device, HMI is most commonly used in the context of an industrial process.

Question 37

HART Protocol

Answer 37

Highway Addressable Remote Transducer Protocol

Question 38

Current Loop Fault

Answer 38

Two different situations may cause common faults in the current loop. One type of fault involves loop breakage, which leads to no current in the loop. The other circumstance is the loss of insulation, which causes current to leak into the ground path.

Question 39

Analogue Sensor Transducers convert their signal to electricity by either:

Answer 39

Varying Voltage (from 0V to 5V, 0V to 10V, or other) or varying Current (from 4mA to 20mA)

Question 40

Condition and Assignment (SCL)

Answer 40

IF (condition) THEN (assignment) END_IF

Question 41

Wheatstone Bridge

Answer 41

A Wheatstone bridge is an electrical circuit used to measure an unknown electrical resistance by balancing two legs of a bridge circuit, one leg of which includes the unknown component. The primary benefit of the circuit is its ability to provide extremely accurate measurements.