Interested to Buy Any Domain ? << Click Here >> for more details...
WHAT IS THE DIFFERENCE BETWEEN PLC AND DCS
- 55 Answers
- 129097 Views
- ABB, Adani, Adani Power, GMR, IIUC, I also Faced
- E-Mail Answers
Answer Posted / mohammed ibrahim khaleel
1. In PLC the heart of the system is a controller,
which contains all logics.
In DCS the heart of the system is HMI.
2. In PLC Operators primary role is to handle
exceptions where as in DCS Operators interaction is
required to keep the process in target.
3. In PLC Status information on/off, Run/Stop is
critical information for operator. In DCS analog trends are
critical, alarm management is Key to safe operation &
failure of HMI could force a shut down.
4. in PLC logic scan is very fast approx. 10 ms is
required to perform function i.e.to change status of motor
where as in DCS scan time is large i.e. 100~500 ms.
5. In PLC redundancy may not be cost justified where
as in DCS system redundancy is often required.
6. In PLC you can’t change configuration online. it
requires offline means shut down where as in DCS online
parameters can be changed i.e. no shut down is required.
7. In PLC analog control is simple PID control where
as in DCS simple to advanced PID control up to advanced
process control.
8. In PLC's use Ladder logic to configure application
where as in DCS use function blocks to configure
application.
9. PLC is useful for small plant application where as
in DCS is used for large plants or number of small plants
to a single platform.
| Is This Answer Correct ? | 0 Yes | 3 No |
Post New Answer View All Answers
What is modbus?
explain key exchanges in all security modes WPA,WPA2,TLS?
Drum level tx with GP4 with zero elevation:7300mmh20 on HP and 8050mmh2o on LP as range but on commissioning the tx readiing is max,Why this reading?
what step is taken for ESD ( emergency shut down) in DCS REPLY to hashimka20009@gmail.com
For what reason would you possibly be compelled to make use of a Smith Predictor. Explain the idea behind the operation of this device.
In dcs panel we are using diff type of modules ?what is module ? what is the use of modules ?diff type of module?
what is loop1 and loop2 in MTS LT?
How servomotor controls throttle valve of TURBINE?
What are the types of valves?
full process of gas turbin?
Define the difference between a stable versus an unstable controlled system and some of the tools you might use to be able to detect when this is happening and assumptions used for control system application design that could contribute to instability
Instrumentation symbols interpration, P& ID, Logic diagram analysis, Electrical drawing analysis.
give me all the details about the interview and which type of question being asked
how many types of viberation transmitter and how to calibrate and where use of vibration transmitter
what is the difference between -24 : +24 & 0:24 and where it use?
