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Hi,
I want to know can we connect SCADA (intounch) with uC like PIC without using PLC???
if yes then why PLC are preferred??
I think your question might be better answered in this forum https://www.plctalk.net/qanda/
Communication infrastructure and methods [edit]
SCADA systems have traditionally used combinations of radio and direct wired connections, although SONET/SDH is also frequently used for large systems such as railways and power stations. The remote management or monitoring function of a SCADA system is often referred to as telemetry. Some users want SCADA data to travel over their pre-established corporate networks or to share the network with other applications. The legacy of the early low-bandwidth protocols remains, though.
SCADA protocols are designed to be very compact. Many are designed to send information only when the master station polls the RTU. Typical legacy SCADA protocols include Modbus RTU, RP-570, Profibus and Conitel. These communication protocols are all SCADA-vendor specific but are widely adopted and used. Standard protocols are IEC 60870-5-101 or 104, IEC 61850 and DNP3. These communication protocols are standardized and recognized by all major SCADA vendors. Many of these protocols now contain extensions to operate over TCP/IP. Although the use of conventional networking specifications, such as TCP/IP, blurs the line between traditional and industrial networking, they each fulfil fundamentally differing requirements.[4]
With increasing security demands (such as North American Electric Reliability Corporation (NERC) and critical infrastructure protection (CIP) in the US), there is increasing use of satellite-based communication. This has the key advantages that the infrastructure can be self-contained (not using circuits from the public telephone system), can have built-in encryption, and can be engineered to the availability and reliability required by the SCADA system operator. Earlier experiences using consumer-grade VSAT were poor. Modern carrier-class systems provide the quality of service required for SCADA.[5]
RTUs and other automatic controller devices were developed before the advent of industry wide standards for interoperability. The result is that developers and their management created a multitude of control protocols. Among the larger vendors, there was also the incentive to create their own protocol to "lock in" their customer base. A list of automation protocols is compiled here.
Recently, OLE for process control (OPC) has become a widely accepted solution for intercommunicating different hardware and software, allowing communication even between devices originally not intended to be part of an industrial network.
I am asking this because if we control two or more sensor for any automation process or building a project for own.
so, buying PLC will be very expensive so, is there any chance with going with uC??
can we connect any uC like PIC with scada intounch for communication of sensors to PC(with scada) without using PLC??
I am asking this because if we control two or more sensor for any automation process or building a project for own.
so, buying PLC will be very expensive so, is there any chance with going with uC??
I am asking that we use costly PLC with scada for automation ?
Call me weird, but if Ritesh asks that question in dedicated PLC forum, I will get some soda and popcorn and lean back for the entertainment!
There's a guy on that Forum who wrote his own HMI software package. Perhaps Ritesh can get some help from him?