PLCs, HMI & Data Acquisition
A PLC (programmable logic controller) is an industrial digital computer designed for the control and automation of manufacturing processes or robotic devices. Programmable Logic Controllers are used where reliability control, simple programming and fault diagnosis is necessary. They were originally built to replace electromechanical relay systems in industrial automation.A CPU (central processing unit) forms part of the PLC system. PLC CPUs are a microprocessor-based control system and act as the electronic circuitry within an industrial computer. They are usually built-in carry out instructions from the computer program via programming languages, performing basic mathematical, logical, control, input and output operations.PLC ApplicationsPLC controllers are incredibly useful and have many applications across several industries such as manufacturing, food & beverage, and building control. PLC’s control the automation process in the machinery used for:Production plantsTraffic light controlsPackaging machinesLifts and escalatorsMedical applicationsAutomatic gate systemsHeating control systemsHow do PLC’s work?PLC Controller’s respond to inputs from programming software and give a desired output. Programmable Logic Controllers can also include human-machine interfaces.Different models use varying PLC Programs based on the programming languages used in the software. Programming languages that are used in PLC programming include:ST: Structured Text (text-based)FBD: Function Block Diagram (graphic-based)LAD: Ladder logic (graphic-based)STL: Statement List (text-based)SCL: Structured Control Language (graphic-based)PLC programming can be quite complex but there are simpler, image-based options available such as Ladder Logic that has user-friendly Ladder diagrams to understand and improve processes. Laptop and software are usually used for Ladder Logic and Ladder Diagrams, however, some older models use handheld controllers.Types of PLC’sProgrammable Logic Controllers can be categorised in multiple ways, each with different functions, features and capabilities. For example, Soft PLC’s are software based and use their own operating system but do not have their own CPU. Whereas, Hard PLC’s are hardware based and typically only include the essential control functions. The full range of programmable controllers include:Hard PLC’sSoft PLC’sCompact PLC’sSlot PLC’sUnitary PLC’sModular PLC’sProgrammable Controllers can also be made more efficient by using equipment such as, HMI displays, DIN Rails, and Communication modules (such as MODBUS) which can be enhanced into a highly functional automated control system with PLC accessories. More information can be found our complete PLCs guide
Showing 1–24 of 307 results
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CP1E-N CPU 24VDC 24XDC I/P 16XPNP
IDR0.00 -
SIMATIC DP, 1 ELECTRON. MODULE
IDR0.00 -
SIMATIC DP, 5 ELECTRON. MODULES
IDR0.00 -
SIMATIC DP ELECTRONIC MODULE FOR ET 200S
IDR0.00 -
CAB17 3M CABLE FOR E SERIES TERMINAL
IDR0.00 -
CAB19 1M CABLE FOR E SERIES TERMINAL
IDR0.00 -
GRAPHIC TOUCH TERMINAL GT2103 ETHERNET
IDR6,035,685.27 -
GT WORKS3, PROGRAMMING SOFTWARE SUITE
IDR5,907,195.02 -
LOGIC CONTROLLER STG-650 CAN
IDR2,858,986.73 -
FX5U BUS CONVERSION MODULE FOR FX3
IDR908,766.96 -
FX5 DIGITAL EXPANSION MODULE 16I 24VDC
IDR4,771,865.66 -
SUPPLY MODULE WITH FUSE DIAGNOSTIC 24VDC
IDR1,431,853.39 -
FUJITSU CONNECTOR, 24 PIN, SOLDER TYPE
IDR1,244,519.85 -
MODULE TM3-16 OUT RELAYS
IDR3,596,048.76 -
CONTROLLER M221-24IO TR.PNP COMPACT
IDR6,402,485.60 -
CONTROLLER M241-24IO TR.PNP ETH. CAN MAS
IDR10,579,520.07 -
V8-OUTPUT ADAPTER EIGHT PLC INTERFACES
IDR916,948.38 -
PANEL FEED-THROUGH MODULE 25-POS
IDR2,964,296.29 -
FX MODULE AD-CONVERTER 2-CHANNEL
IDR5,005,770.36 -
CONTROLLER ALPHA 2 14I/O 120/240VAC
IDR3,832,995.27 -
SM321, 16DI, DC24V, SOURCE INPUT
IDR4,605,300.34 -
SIGNAL BOARD SB1222, 4 DQ 5VDC 200KHZ
IDR1,825,295.78 -
TEMP CONTROL MODULE, COMMS CONVERTER
IDR1,195,116.66 -
FX3 PLC RS485 INTERFACE MODULE MODBUS
IDR3,222,850.14
