WHAT IS THE DIFFERENCE BETWEEN DCS & PLC.
Answers were Sorted based on User's Feedback
Answer / vaibhav
DCS is used for continious process while PLC is used for
sequential control system
Is This Answer Correct ? | 15 Yes | 3 No |
Answer / www.islamqa.com
# PLC is first invented and developed to be used with
discrete - on/off control & with small scale applications.
# DCS is designed and fabricated to handle modulating/PID
control applications & to serve in large scale I/Os
applications.
# with great progress and achievements in plc h/w and
networking technologies we have PID algorithms with PLC and
also plc become able to handle wide range of I/O'S like
DCS, actually with good engineering the one can build his
own DCS with multible PLCs.
# But actually with great engineering to build the DCS from
multible PLCs it will not be the same as pre-built/ready to
use DCS system in its functionality and its features.
# DCS is pre-fabricated system with compatible, integrated,
and tested H/W & S/W - has the following features:
- data collection & management.
- event and history management.
- instrument management.
- alarms management.
- smart and self diagnostics.
- advanced control strategy and easy to build, configure
control loops.
- redundancy.
Regards,
Ahmed Sabry
Control and Instrumentation Engineer
GPC - General Petroleum Company
ahmedsabry.online@gmail.com
CELL.: 00 2 0121367310
Is This Answer Correct ? | 10 Yes | 1 No |
Answer / dibyendu
the scan time for plc is much lesser than dcs and plc can
hanhle digital signal more efficiently,dcs can handle analog
signal more efficiently.
Is This Answer Correct ? | 3 Yes | 4 No |
Answer / joe mccabe
A lot of IO..specifically for a larger operation where there
are is lot of PID control, taking in analog inputs and
controlling outputs.
Is This Answer Correct ? | 4 Yes | 6 No |
Answer / hari
DCS can handle 32 loops can be handle in single shot.
but plc can perform less than DCS..
DCS had faster scaning time.
plc can handle 6 loop in single shot
DCS can be programmed like FBD
Is This Answer Correct ? | 1 Yes | 3 No |
Answer / anil
In DCS Scan time of each channel can be set but in PLC the
scan time is fix
Is This Answer Correct ? | 0 Yes | 2 No |
Answer / alok
where lot of no. io's are used there we used dcs this basic
difference b/w dcs and plc.
Is This Answer Correct ? | 0 Yes | 9 No |
What is the definition of direct acting valve & reverse acting valve
How to calibrate RC Feeder system in thermal power station?,If any instrument available to calibrate it,ple inform me. make:stock,
what is the procedure of O2 sensor(ABB) calibration?
why we used for range in pnumatic 3-15 psi and current 4-20 ma?
Please tell me details about Sox,Nox,SWAS analyser????
Difference between ultrasonic flow meter and radar type flow meter
2 Answers Dodsal, Qatar Petroleums,
what is flow equation of kg/hr to m3/hr
what is installation and commissioning of (fat & sat) of power plant dcs ? this question keeps in desirable conditions of one company .
Consider a control valve action,the inlet air pressure is only 6 ksc but physically how it can be operate against 100 ksc line fluid pressure?
Transmitter reading is zero but in DCS showing one Bar what is the reason ?
What different types of problems do occur while doing the loop checking? and please explain in detail or mail me at kadam.aniket143@gmail.com
1 Answers Operational Energy Group, Process Control Technologies,
what is vfd(variable frequency drive)?type of vfd.