Introduction:

In PLC (Programmable Logic Controller) is an electronic solid-state device that can control a process or a machine and has the ability to be programmed or reprogrammed quickly according to the demand of the application.

It was invented to replace the relay-based sequential circuits that were necessary for machine control. The PLC works by monitoring its inputs, and depending on its status, activating and deactivating its outputs.

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PLCs are used in many applications:

• Parts machining
• Packaging machines
• Material handling
• Automatic assembly
• Petrochemical / Chemical
• Mining
• And in general, any type of application that requires electrical controls can use a PLC.
  
• More PLC Project samples is in this link -> (PLC Projects)
  

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Top 15 PLC Brands:

1. ABB
2. Allen-Bradley
3. Siemens
4. Honeywell
   
5. Mitsubishi
6. Yokogawa
7. Toshiba
8. General Electric
9. Omron
10. Schneider Automation
11. Reliance
12. Hitachi
13. Modicon/Gould
14. AutomationDirect/PLC Direct/Koyo
15. Cutler Hammer

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Types of PLC:

Compact:

• Monolithic construction.
  
• Monoprocessor.
  
• Fieldbus connection.
  

Modular PLC:

• Modular construction (backplane).
  
• One- or multiprocessor system.
  
• Fieldbus and LAN connection.
  

Soft-PLC:

• Windows NT or CE-based automation products.
  
• Direct use of CPU or co-processors.
  

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Top PLC Brands & types of PLC:

At present many brands and types of PLC are widely used in industries ranging from low-end to high-end. Here are some brands and types of PLC that are widely used in industry:

Brand	Software's used	Type	Types of PLC
Allen Bradley	RS Logix Studio Logix Designer Connected Components Workbench	Logix-5 Family Logix-500 Family Logix-5000 Family	1.PLC-5 1. SLC-500 2. Micrologix 1. ControlLogix 2. CompactLogix 3. FlexLogix
Siemens	Simatic TIA Portal	Micro PLC Modular PLC	1. S7-200 2. S7-1200 1. S5-115U 2. S7-300 3. S7-400
Omron	CX programmer CX Developer	Micro PLC Basic PLC Modular	1. CPM1A 2. CP1E 3. CP1L 1. CJ1M 2. CQM1H 1. CJ1H/CJ1G 2. CS1H/CS1G
Schneider	PL7 ProWORX 32	Micro PLC Machine Control PLC Process Control PLC Programmable Controller Smart Relay	1.Modicon M340 1.Modicon Premium 1.Modicon Quantum 1.Twido 1.Zelio
Mitsubishi	MELSOFT series GX Works 2	Compact PLC Modular PLC Process Control	1. MELSEC FX3UC 2. MELSEC FX3G 3. MELSEC FX1N 4. MELSEC FX1S 1.Q-Series Q00UJCPU 1.Q12PHCPU
GE FANUC	PROFICY Series	Proficy Machine Edition 9.5	1.Series 90-30

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