Adcon A720 Podręcznik Użytkownika Pobierz pdf (Strona 8)

addVANTAGE Pro 6.4 Administrator Guide CHAPTER 1

What is the Adcon System?

adapted to Adcon’s system. Figure 1 illustrates the components of the Adcon

system.

Figure 1. The Adcon Telemetry System

System Components

The electrically converted parameters are first stored in the memory of a remote

telemetry unit, or RTU. Adcon currently provides a large array of RTUs

employing different wireless technologies, from private radio to GSM/GPRS

based devices.

An RTU has its own intelligence in the form of a built-in microcontroller, which

periodically performs several tasks, for example, interrogate the sensors, store

the measured data, check the radio channel, check the local battery status, and

so forth. It is part of a remote station, which consists of the RTU, its assembly

parts, and its sensors. The RTU is equipped with a radio module or a GSM

modem, which allows for real-time wireless communication with a base station.

Reverse communication is also possible with the Adcon system. The

addVANTAGE Pro software can issue a command that will be sent via the

wireless network to the RTUs to control devices such as switches, pumps,

motors, and relays.

The base station consists of a Telemetry Gateway (or receiver) and your

personal computer. The Gateway acts as a network controller—at regular

intervals (typically 15 minutes, but this can be changed) it requests data via

radio or modem from the RTUs in the network. The receiver stores the incoming

data in its memory, thus allowing the receiver to supervise a large number of

RTUs and keep their data for a period of time without the need to download the

data to the PC. The number of controlled RTUs depends on the receiver type,

and some receiver models can handle over 1000 units

Note: The period of time a receiver can store data is dependent on the number of

RTUs in the network and the type of receiver. The oldest data is overwritten.

The addVANTAGE Pro software regularly downloads the data from the receiver’s

memory to the PC. The receiver’s internal battery allows it to operate for 12 to

24 hours (depending on the number of RTUs to be requested and the respective

polling interval) in the event of a power outage. After that, the receiver stops

accumulating data, but it keeps the data already retained—even without

power—until you are able to provide power to it.

A Modular Approach

The addVANTAGE Pro software, which is based on a client/server architecture,

collects data from one or several Adcon Telemetry Gateways (receivers) and

makes it available for viewing or for specialized analysis.

The server is that part of the software where all the actual processing takes

place. It usually starts automatically when the computer is started and runs in

the background. The server is responsible for downloading data from the

Telemetry Gateway, storing data into the database, starting and stopping

extensions, and servicing clients as they connect.

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