Remote Telemetry

Technical Specifications

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Remote Telemetry Technical Specifications

Remote Terminal Unit (RTU)
SCADA
Programmable Logic Controllers (PLC)
ISaGRAF
IEC 61131-3
Ladder Logic Programming
Simple Network Management Protocol (SNMP)
Short Message Service (SMS)

Remote Terminal Unit (RTU) (Return to Top)
Is a microprocessor controlled device that connects devices in the physical world to a SCADA system. This is done by transmitting telemetry data, data in the field can come in the form of digital and analog signals. Communication interfaces to the central location come in various forms: serial, Ethernet, etc. Protocols such as ModBus, DNP3, etc. are supported. RTUs are used in wide ranging applications where wireless transmission of data is necessary. PLCs are more suitable for local applications. RTUs allow a central SCADA system to communicate with field instruments. All data acquisition are fitted into a single device.

SCADA (Return to Top)
Stands for supervisory data acquisition. More specifically, a system that incorporates a computer system that monitors applications including but not limited to industrial, infrastructure, and facility processes (public and private sectors). A full SCADA system has hardware and software components; the hardware gathers data and sends it to a computer where the software processes the data and presents it to the user in the necessary form.

Programmable Logic Controllers (PLC) (Return to Top)
The purpose of a PLC was to directly replace electromechanical relays as logic elements and replacing it with a digital computer that has stored programs able to emulate the connections of many relays. To simplify the programming language, the configuration was designed to resemble ladder logic diagrams.

ISaGRAF (Return to Top)
Is the most powerful SoftLogic package on the market. A software similar to that used on a PLC and can be run on various versions of Windows. IEC 61131-3 PLC programming language is supported. Features include offline simulation, online debugging, monitoring. The overall goal is to transform any industrial computer or microcontroller into a high performance, inexpensive, and open PLC.

IEC 61131-3 (Return to Top)
This is the first vendor independent programming language for industrial automation. Established by the International Electrotechnical Commission, is well established in Europe and is growing throughout North America and Asia. It support multiple languages, hardware indepedent, with a standardized programming interface has increased performance, reliability, and simplification of many automation applications.

Ladder Logic Programming (Return to Top)
This is the first vendor independent programming language for industrial automation. Established by the International Electrotechnical Commission, is well established in Europe and is growing throughout North America and Asia. It support multiple languages, hardware indepedent, with a standardized programming interface has increased performance, reliability, and simplification of many automation applications.

Simple Network Management Protocol (SNMP) (Return to Top)
This is an internet standard protocol that is used for managing devices on a IP network. Routers, switches, work stations, printers, and modems are examples of some devices that support SNMP. Included is a set of standards, including that various components of the IP suite. The three main components are a managed device, agent, and network management system.

Short Message Service (SMS) (Return to Top)
This is a form of text messaging communication used on phones/mobile phones. RTUs that is connected to or has a GSM/CDMA modem can send an SMS message. A message can be sent to multiple users. Mobile phone services are able to provide SMS services.