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Origins and uptake The technology has its origins with chip designs, power line and twisted pair, signaling technology, routers, network management software, and other products from Echelon Corporation. In 1999 the communications protocol (then known as LonTalk) was submitted to ANSI and accepted as a standard for control networking (ANSI/CEA-709.1-B). Echelon's power line and twisted pair signaling technology was also submitted to ANSI for standardization and accepted. Since then, ANSI/CEA-709.1 has been accepted as the basis for IEEE 1473-L (in-train…
SCADA (supervisory control and data acquisition) generally refers to industrial control systems (ICS): computer systems that monitor and control industrial, infrastructure, or facility-based processes, as described below: Industrial processes include those of manufacturing, production, power generation, fabrication, and refining, and may run in continuous, batch, repetitive, or discrete modes. Infrastructure processes may be public or private, and include water treatment and distribution, wastewater collection and treatment, oil and gas pipelines, electrical power transmission and distribution, wind farms, civil defense siren…
DeviceNet is a network system used in the automation industry to interconnect control devices for data exchange. It uses Controller Area Network as the backbone technology and defines an application layer to cover a range of device profiles. Typical applications include information exchange, safety devices, and large I/O control networks. DeviceNet was originally developed by American company Allen-Bradley (now owned by Rockwell Automation). It is layered on top of the CAN (Controller Area Network) technology, developed by Bosch.DeviceNet adapts the…
Fiber media converter Fiber media converters are simple networking devices that make it possible to connect two dissimilar media types such as twisted pair with fiber optic cabling. They were introduced to the industry nearly two decades ago[when?], and are important in interconnecting fiber optic cabling-based systems with existing copper-based, structured cabling systems. They are also used in MAN access and data transport services to enterprise customers. Media conversion types Fiber media converters support many different data communication protocols including…
It’s important to note– that all self-healing ring methodologies are not alike. In fact, the term “self-healing ring” is frequently interpreted differently by end users and vendors alike. Vendor offerings vary greatly in terms of function, features and sophistication. Before buying a system, end users should identify what they need in terms of a “self-healing” function and request specific details pertinent to these identified needs from the prospective vendor. For example, many vendor offerings can detect cable breakage only at…
Field busses are industrial control systems using Programmable Logic Controllers (PLC) to control and manage field devices found in industrial environments. The communication medium can be any combination of copper wire, fiber optics or wireless. Over time, many field bus systems have been developed and several are standardized in IEC 61158. IEC 61158 describes PROFIBUS as Type 3 and PROFInet as Type 10. IEC 61784 further defines communication profiles and sets. • Profile set 3/1 is used with PROFIBUS asynchronous…
In computing, a serial port is a serial communication physical interface through which information transfers in or out one bit at a time (in contrast to a parallel port).[1] Throughout most of the history of personal computers, data transfer through serial ports connected the computer to devices such as terminals and various peripherals. While such interfaces as Ethernet, FireWire, and USB all send data as a serial stream, the term "serial port" usually identifies hardware more or less compliant to…