Answer / ankur kumar

Supervisory Control and Data Acquisition
Programmable logic control

Answer / justin

PLC- programmabale logic controller - more like a micro
controller but program resides in PLC can b modified without
knowledge of C or assembly language. maily used for making
logical flow of a process..

whereas

scada- supervisory control and data acquisition system- this
is software that control two or more PLCs.. Donno in which
laguage this program is written but as far as n
instrumentation engg is concerned we need to control PLCs
from scada.

Answer / raghavendran prabhu lnt

PLC and SCADA are used in the automation field which is a
booming field now adays

PLC-Programmable Logic Controller
SCADA-Supervisory Control and Data Acquisition.

PLC is very good Programmable storage device which performs
more than few operations in a ckt using timers & counters

SCADA is the process which is used as a monitoring&
controlling device from a single place.

Answer / naseem ahmed

PLC: PLC is a Micro Processor based Electronic Device which is used to control certain process according to predefined programs which are saved in the PLC. These programs can be change or modified as per the requirement.

SCADA: as its name Implies Supervisory Control and Data acquisition, is used for monitoring and controlling of Processes which displayed graphically. Through SCADA we can do just small changes during the execution of process ( e.g, we can change only value of variables). Also it gives feature like storing, and can communicate to other servers.
Here programming is done in Scripting language.

Answer / ur rahman

PLC : PLC is a device which is used to control field devices based on the instructions given to it

Scada: Supervisory control means not directly control the field devices monitor the devices and control through the PLC

PLC : Data storage is not possible.

Scada: Gather the required information and store at one place.

Answer / guna

PLC - Programmable logic controller. Its a hardware, which is directly in contact with field instruments. it works according to the logic written in plc.(EX: like a computer hardware)

SCADA - Supervisory control and data acquisition. Its a software, which shows the out put feed back in visual manner, that plc cant do. (EX: like a computer screen)

Answer / amit gavali

PLC: PLC is solid state device.......it is one type of controller but SCADA is process which is associated with PLC

Answer / dhanshri narayane

Plc is the individual computer control system that continuously monitors the state of input devices and make decisions based on custom process and monitors state of output devices.

SCADA is Supervisory Control And Data Acquisition is a system for remote monitoring and control that operates with coded signal over communication channels.

Answer / tarlochan

plc is part of scada system.

Answer / rajendra

plc: programable logic controller
by plc we've control monitering and veriable the value also change the programming acording to requirement of process.




scada: supervisory control add data asquistion.




by scada we've control,monitoring and display the system but not change the program.

What Happen When output Short of transformer

2 Answers   L&T, Saber Corporation,

we are going to install a solar PV site and how can we calculate PV Solar Panel Efficiency, can anybody tell me complete method for its calculation.

0 Answers  

what is transformar load balancing ?

2 Answers   L&T,

Meaning of ingrace protection for motor.for ex IPXY

0 Answers   BARC,

What is difference between YNyn0 and YNyn ??

0 Answers  

what is the difference between neutral and earth????

4 Answers  

every motors written in name plate IP 55 what is this?

2 Answers  

what is work of choke in tube light?

4 Answers   L&T,

what is the basic differnce between ground and earth

3 Answers  

On load tap changer (OLTC) explode? Transformer Vector group: Ynd11 Rated Power: 353MVA Rated Current: 693A Voltage:294/20KV OLTC Type: T III Y1000 110/c 12193w Max Operation Current: 295A Step Voltage: 550V Arrangement in Tx windings: Y Connection Problem: Damage of Unit 1 Generator Transformer On Load Tap Changer (OLTC) Description of Incident: 9.00 a.m. :- Generator No Load test on excitation system started 10.30 a.m :- Carried out AVR change over test 11.30 a.m :- Preparation for Generator Manual Synchronizing test 12.00 a.m :- Manual Synshronizing test started. Observed incoming generator voltage higher than running voltage. CECR operator operated Generator Transformer OLTC to bring down the incoming generator voltage 12.03 a.m :-Generator Transformer abnormal alarm operated at Gen.Control Desk (CECR) CECR operater at Generator transformer bay informed that the transformer oil splashed out from OLTC. CECR operater informed that he heard explosion inside OLTC. Observed Oil level & Oil Flow alaram operated at Tranformer local annunciator. 12.05 am :- CECR operator 'Open Gen Field Breaker” 12.10 a.m. :- Elec1 team inspected the OLTC and found the OLTC rupture disk was broken and oil spilled at OLTC area. - Elec1 found the OLTC top cover bulging. Do anyone know why and possibility cause happen in this OLTC.

9 Answers  

how synchronous condenser is used in place of synchronous generator with out negotiating IEEE standards? Can i use 3 generators as synchronous generators and 2 generators as a synchronous condensers in an IEEE 14 bus system with out disturbing the standards?

0 Answers  

How is the connection of the tap changer on the HV side been made?

0 Answers