What is the difference between PLC-HMI and DCS
as each function of DCS based system is possible in PLC ?
Answers were Sorted based on User's Feedback
Answer / sachin patel
PLC is the Solid State device. Which is used in Discrete &
Sequential logic in which Timer, Counter, Relay in the form
of Software Called the PLC.
It is two type- 1- Compact or Non modular plc.
2- Modular plc.
* In compact PLC I/O are fixed (Allenbradilly,
Seimeance,Mitshubishi plc )
* In Modular PLC I/O are Increase. (SLC- Sequential logic
controller).
DCS is the Distributed Control system. It is advance of the
PLC. It is used in Big Industry. In DCS I/O is nearly 1 lakh.
HMI- It is a Human Machine Interface.It is used for field
instrument control.
Is This Answer Correct ? | 2 Yes | 0 No |
Answer / ghanshyam khatri
plc is programmable logic control ,plc is used in small
application,it is works on small program which is created
in computer then send to plc.plc have memory to store this
programme and then perform.
hmi is human machine interface,hmi is used for smaller
appliction then plc.
dcs stand for distributed control system this is used for
big plants(for larger amount of i/o)
main diffrence in plc n dcs is
1.in dcs we can change programme during it is working,this
is not possible in plc.
2.in dcs trend and history is available.
Is This Answer Correct ? | 4 Yes | 3 No |
Which tank weighing system is better to install (Accuracy point of view) 1) Tank weighing system with 3 load cell or 2) Tank weighing system with 4 Load cell
CAN YOU USE MOVING COIL METER FOR MEASURING A.C?
If we increase D what will be the controller action?
Explain plc level and its type?
In close vessel/ drum why we use d.p. transmitter of -ve range i.e. (-)500 to 0 mmwc.
what is the exact job for automation enggineer?
components of control circuit belongs to control valve
why ultra sonic level transmitter is installed in 90 degree?
if a tank is contaning oil and water than how can we measure the oil and water level seperately
what is intools software
My question may be very basic or childish but this question still persists in me, someone plz help me 1.why do we go for differential equations to analyze a system? 2.why do we solve it using matrices, is there any specific reason for using matrices other than the stories like it is simple,faster etc.
How to convert 0-2500mmH2o into kg/hr? Or how to convert mmH2O into kg/hr,t/hr etc