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Q.

What is the different between scada and plc ?

Asked by mikazi kazi, 19 Feb '09 12:10 pm
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Answers (4)

 
1.

SCADA stands for Supervisory Control And Data Acquisition. It generally refers to an industrial control system: a computer system monitoring and controlling a process. The process can be industrial, infrastructure or facility based as described below:

Industrial processes include those of manufacturing, production, power generation, fabrication, and refining, and may run in continuous, batch, repetitive, or discrete modes.
Infrastructure processes may be public or private, and include water treatment and distribution, wastewater collection and treatment, oil and gas pipelines, electrical power transmission and distribution, and large communication systems.
Facility processes occur both in public facilities and private ones, including buildings, airports, ships, and space stations. They monitor and control HVAC, access, and energy consumption. A SCADA System usually consists of the following subsystems:
A Human-Machine Interface or HMI is the apparatus which presents pr ...more
Answered by suvendu dalai, 19 Feb '09 04:51 pm

 
  
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2.

PLC (Programmable Logic Controller) is basically used for automation of Machine or process control. This replaces the conventional Relay logic and reduces complicated hardware wiring and hardware count.

SCADA (Supervisory Control And Data Acquisition) is a centralised system which monitors or controls through many PLCs on a Network. The network may be of Ethernet or proprietary fieldbusses (Profibus, devicenet, MPI etc.,)
Answered by TK Balaji, 03 Mar '09 12:03 pm

 
  
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3.

PLC is Programmable Logic Control- by which you can program a machine sequence & SCADA is a Supervisory Control & Data Aquisition System-It is used for communicate with PLC & other third party device & show the Data & also store the data & take reports
Answered by atul, 07 Apr '09 02:30 pm

 
  
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4.

PLC is power line control, it is the basic science behind the SCADA (Supervisory control and data acquiation system) and SCADA is utility using PLC as brain.
Answered by Chinna, 19 Feb '09 12:45 pm

 
  
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