A Complete SCADA/Telemetry Solution

onaSCADA Applications

onaSCADA is a SCADA and telemetry solution developed by Onacom. It is a robust SCADA engine that is used to build RTUs of various sizes: ranging from a few data points to hundreds of data points.

onaSCADA RTUs provide reliable service for mission-critical applications like SCADA & Telemetry for Utilities, SmartGrid power network, Oil and Gas Pipeline Telemetry Systems, Pipeline Leak/Integrity Monitoring, Dataloggers, Protocol Convertersand other types of systems


  • Cost effective
  • Various applications
  • Open protocols
  • Robust and scalable
  • Multi-platform
  • Graphical user interface

Features and Benefits
  • Real-time data acquisition
  • Remote asset monitoring
  • Distributed live & historic data
  • Memory-resident live database
  • Disk-based historic database
  • Automatic historic data recovery
  • Redundant data links
  • Low bandwidth support
  • Open protocols support: MODBUS ASCII/RTU/TCP, FTP, SMTP
  • Custom protocols support: onaData, onaComms
  • Graphical user interface, GUI, support: Mimics, Graphers, Tables
  • Robust and scalable
  • Client/server applications
  • Multi-platform: Linux, QNX and Microsoft Windows
  • Cost effective
  • Oil and Gas Pipeline Telemetry Systems
  • SCADA Systems
  • Oil Field and Pipeline Visualisation
  • Wellhead Monitoring: Wellhead to Desktop
  • Pipeline Leak/Integrity Monitoring
  • Dataloggers
  • Protocol Converters
  • Virtual Flow Meters
  • Flow Totalisers
  • Data Servers
More on Features and Benefits

onaSCADA offers a secure client/server architecture. It allows client applications to simultaneously connect and view data and also control remote processes.

onaSCADA is firewall friendly and runs a secure UDP protocol for its communications. It supports several standard protocols including MODBUS RTU/ASCII/TCP slave/master. The built-in redundancy feature of the system offers reliability and high availability. With the system's mirroring capabilities, data can be safely and securely shared in a distributed network topology. With the built-in historic database, data can be stored for several years and viewed almost instantaneously.


onaData is an application level data exchange protocol used to implement SCADA and telemetry data links. The protocol relies on onaComms, a lower level transport protocol, which reliably delivers data packets between two end points.

onaData key features:

  • Simple data packets
  • High latency and low bandwidth links support
  • Connectionless transport, UDP
  • Link aggregation/multiplexing support
  • Redundant links support

onaComms is a data transport protocol that provides transport for the onaData data exchange protocol. The protocol supports two types of framing: stream framing, RS232 and packet framing, UDP transmission.

onaComms key features:

  • Simple data packets
  • Packets encryption with Twofish algorithm
  • Packet data integrity checking
  • Connectionless communication - ideal for high latency and low bandwidth links
  • Simple communication - no master/slave handshaking

onaSCADA is used to build RTUs of various sizes: ranging from a few data points to hundreds of data points. Our RTUs are custom built to meet our clients requirements.

Our RTUs are flexible and expandable: they can be built with on-board I/Os or external 3rd-party I/O modules to meet a wide range of I/O requirements. Our RTUs support wireless transmission in the 900MHz or 2.4GHz ISM band via add-on radio modules.

Features and Benefits
  • Expandable I/O count
  • Various I/O capabilities: AI, AO, DI, DO, RTD, Pulse counter
  • RS232/RS422/R485 serial interface
  • Ethernet interface
  • Modbus master/slave function
  • Peer-to-peer and peer-to-multi-peer communication
  • Full repeater capabilities
  • Wireless communication: 900MHz or 2.4GHz ISM
What is SCADA and Telemetry?

The purpose of a telemetry system is to collect data at a place that is remote or inconvenient, say an oil production offshore installation, and to relay the data to a point where the data may be evaluated, say a business onshore office. Using telemetry system, a process operator gets various measurement information about the process of interest remotely.

Telemetry system is a computer-based system used to monitor equipment in industries such as transportation, telecommunications, water and waste control, energy, oil and gas production, transportation and oil refining etc. When telemetry system is used for both data collection and control, which is usually the case in modern applications, the term SCADA (Supervisory Control And Data Acquisition) is used to describe the system. So, SCADA = Telemetry + Supervisory Control.

SCADA system is a computer-based system for gathering and analyzing real-time data to monitor and control equipment. Today, SCADA systems are an integral component in virtually all industrial plant and production facilities.

Key Componets of a SCADA/Telemetry System

SCADA systems utilize Control Systems: Distributed Control Systems (DCS) and Process Control Systems (PCS); Programmable Logic Controllers (PLC); Remote Terminal Units (RTU); workstation computer that act as the human-machine interface (HMI); wireless technologies and so on. The RTU and the PLC perform the majority of local and remote process alarming, monitoring, data acquisition and control. In the Oil and Gas industry, PLCs and RTUs are very common.

plc rtu io
onaSCADA and Modern Industrial SCADA and Telemetry Systems

First generation SCADA and telemetry systems adopted the architecture of mainframe computers: networks were generally non-existent and each mainframe computer stood alone. As a result, SCADA and telemetry systems were standalone systems with virtually no connectivity to other systems.

The current generation of telemetry systems employs open system architecture rather than vendor controlled proprietary architecture. Open standards eliminate a number of the limitations of previous generations of telemetry and SCADA systems. Today, a key component of the telemetry system, the RTU, is referred to as a microcomputer-based system with analogue and digital input/output interfaces to the instrumentation and control system at the remote station [RIW].

Because of the availability of "off-the-shelf" systems, SCADA and telemetry system vendors like Onacom have gradually gotten out of the hardware development business and rely on hardware system vendors such as Hewlett-Packard, Dell, ABB and so on; and also rely on operating system vendors like QNX, Debian Project and Microsoft for their expertise in developing the basic computer platforms and operating system software. This means that Onacom can concentrate her development efforts in areas where she can add most value: in software development and system design. This is the typical business model of onacom. Onacom relies on experience hardware vendors for computer system hardware and data acquisition hardware but provides a robust SCADA/Telemetry software suite, the onaSCADA, that runs on the hardware.

The onaSCADA software suite can run on various computer hardware: from small computers like the the Raspberry Pi to multi-core high horse-power computers.onacom

This philosophy and business model enables Onacom to offer cost effective solutions and reliable systems.

Onacom logo Linux logo QNX logo Windows logo

[RIW] R.I. Williams, Handbook of SCADA Systems for the Oil & Gas Industry. Great Yarmouth: Elsevier Advanced technology Limited, 1992.

How to Order

We supply onaSCADA, our custom RTUs and other products built with onaSCADA directly to our customers. Please contact us with your requirements.

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