Connecting SCADA with uC...??

misterT · May 9, 2013

RITESH KAKKAR said:
OK, one more question Why we control automation using PLC not by Embedded system???

PLC is embedded system.

koolguy · May 9, 2013

PLC is embedded system.

SO, why they are so costly and why they only work on Ladder programming....?

misterT · May 9, 2013

RITESH KAKKAR said:
SO, why they are so costly and why they only work on Ladder programming....?

They cost much because some people are willing to pay much for a quality product.
There are other ways to program PLC than ladder programming. You can program them using function blocks, structured text, instruction list, sequential function charts.. Those are all standard ways to program PLC logic.

koolguy · May 9, 2013

They cost much because some people are willing to pay much for a quality product.

What additional quality does PLC contain then uC??

misterT · May 10, 2013

RITESH KAKKAR said:
What additional quality does PLC contain then uC??

PLC card is a complete product ready for use. uC is just a component. You could build a PLC card using any uC you like.

koolguy · May 10, 2013

PLC card is a complete product ready for use.

What features does PLC card make superior???
and why people distinguish PLC from uC ?
why PLC are so costlier than a uC??

misterT · May 10, 2013

RITESH KAKKAR said:
What features does PLC card make superior???
and why people distinguish PLC from uC ?
why PLC are so costlier than a uC??

Like I said. PLC is a complete product that you can plug into your industrial control system. That makes PLC superior over uC, that is why it is costly and that is why it differs from uC.

Take a look at this PLC system.. do you see the difference to uC? Do you see why it cost money?
**broken link removed**

I am soon running out of popcorn here. Go ask further questions to the dedicated PLC forum. They are experts to answer all your fancy questions. https://www.plctalk.net/qanda/

koolguy · May 10, 2013

OK, uC contain all devices in it like ADC, UART, etc so why it is so big box ...?

misterT · May 10, 2013

RITESH KAKKAR said:
OK, uC contain all devices in it like ADC, UART, etc so why it is so big box ...?

To keep the wires tidy and for easy maintenance. Connectors, relays, power supplies take room.

koolguy · May 10, 2013

that mean we can build low scale PLC at home??

misterT · May 10, 2013

RITESH KAKKAR said:
that mean we can build low scale PLC at home??

Yes. You can do that.

koolguy · May 10, 2013

OK, then how to do this??
one thing more i have seen one PLC training , which has only 5 or 6 input and 4 or 5 output but the cost was very high then uC and size was not so big like a small thick book, why?

misterT · May 10, 2013

RITESH KAKKAR said:
OK, then how to do this??

Impossible to say. I do not have enough information about what you are trying to do.

RITESH KAKKAR said:
one thing more i have seen one PLC training , which has only 5 or 6 input and 4 or 5 output but the cost was very high then uC and size was not so big like a small thick book, why?

I have no idea, maybe there is a bar of gold inside. Or maybe they have spend million dollars to develop that product. Maybe it ships with tons of software. You know that software is only the size of a CD and still it can be very expensive. Should it be cheap because it is small? That is just stupid.

koolguy · May 10, 2013

Its OK, i was just comparing to uC.....
Rs 200/. to Rs 10,000/.

I do not have enough information about what you are trying to do.

As i said before i want small automation like filling of tank in screen.

misterT · May 10, 2013

RITESH KAKKAR said:
As i said before i want small automation like filling of tank in screen.

So, what is the problem you are having? If you want to use the InTouch software, but you do not know how to connect to your system, then you should contact the official Wonderware Support. I can't help you with that.
**broken link removed**

koolguy · May 10, 2013

I have used in touch for making small automation....and connected PLC for LED test simple in college now i want to make uC based PLC connection to intounch without buying PLC....

misterT · May 10, 2013

RITESH KAKKAR said:
I have used in touch for making small automation....and connected PLC for LED test simple in college now i want to make uC based PLC connection to intounch without buying PLC....

Ok.. what communication protocols does the InTouch support?

koolguy · May 10, 2013

Rs232 and USB ethernet......

misterT · May 10, 2013

RITESH KAKKAR said:
Rs232 and USB ethernet......

I asked what standard automation protocols it supports. Modbus ASCII would be the easiest to use, if it supports that. https://en.wikipedia.org/wiki/Modbus

koolguy · May 10, 2013

standard automation protocols it supports

is it different from serial communication??

Connecting SCADA with uC...??

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