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SCADA – PLC modbus communication

Connecting PLC in industrial environment with SCADA systems using Software Defined Wide Area Networks (SD-WAN), GWG 3G/4G Gateway and mobile technologies. In this project, we used SIM cards from one of the global mobile providers with coverage in many countries and its SD-WAN solution based on the cloud because it is easy to deploy and user friendly with a high level of automation.

Geneko Remote Access solutions

In a situation caused by extraordinary circumstances, it is necessary to ensure continuity of business and provision of services. In such situation, it is very important to provide your employees with safe and efficient way to work remotely from home and access company resources.


 

GWRI-Fast-Industrial-Cellular-Router-Series

 

GPS Technology

GPS (Global Positioning System) is satellite-based global navigation system which provides accurate location information anywhere on Earth in all weather conditions. The only condition for accurate positioning that has to be met is that the location has unobstructed line of sight to at least four GPS satellites.

 

GPS is developed and maintained by U.S. Department of Defense under an official name NAVSTAR-GPS, but in the last decade is in the great expansion regarding civil use. Although U.S. Government can cause interruptions in detection of positions by GPS in some cases (war, military interventions…) this right has been renounced as the system will be mostly exploited for civil and peaceful purposes.

 

As of September 2013, United States’ GPS and Russian GLONASS are global operational navigation satellite systems. China (Beidou) and European Union (Galileo) are set to make their own global satellite navigation systems operational by 2020s at the earliest.

 

 

What is GPS and how is it functioning?

 

Global Positioning System consists of 32 satellites that are circulating in the medium orbit around earth. Each satellite broadcast specific microwave signals at 1575.42 MHz which GPS receiver positioned on or near Earth surface uses to determine location, speed, movement direction and height above sea level.

 

GPS satellites are positioned at 20200 km above the sea level on earth and are moving at 3.9km/s. In such way, each satellite circles the Earth twice a day.

GPS System - How it works

GPS system - how it works

 

 

How GPS receivers get data from the satellites? Firstly, GPS receiver calculates its position by the messages it gets from GPS satellite. A message contains very precise time of sending the data from the satellite to the earth surface. Each satellite keeps sending messages with precise information on satellite orbit as well as not so precise information on the orbit of other satellites in the system. When the satellite signal is received, receiver determines distance from each satellite and with use of geometry and trigonometry algorithms it calculates exact position on or near Earth surface. Then it converts raw data into a user-friendly form such as graphic or alphanumeric display of latitude and longitude (coordinates).

 

In order to determine exact 2D position, GPS receiver needs signal from at least 3 satellites. For the exact height above sea level, it requires signal from at least 4 satellites. Since the total number of GPS satellites is 32, more than 4 necessary satellites are available to GPS receiver at any moment. Receiver uses this redundancy in order to determine as accurate position as possible and to avoid atmospheric and reflection influence on GPS signal path.

GPS Satellite path

GPS satellite path

 

 

GPS system functioning requires satellites to send messages with very precise moment of sending, i.e. they must have highly accurate real-time clocks. That is the reason all satellites use atomic clocks. But despite the fact that atomic clocks generate very precise time measuring (with just one second error in several million years) due to very high speed of satellites’ movement through space, and according to Theory of Relativity, the clocks are getting slower: the slowdown is approx. 38.6 microseconds for each day of operation. That would surely cause an error in determination of GPS receiver position and that is the reason why the clocks in GPS satellites are coordinated on almost daily basis by radio signal with reference clock on the earth surface.

 

GPS system is, for the time being, the only practical example that the Theory of Relativity has influence on the system operation due to the slowdown caused by high speed of satellite movement as per the earth surface. This makes it very interesting for research and its use for scientific purposes.

 

 

Geneko FOX devices

 

Geneko has developed several different devices for vehicle satellite monitoring and supervision. All of the products are trademarked as Geneko FOX Devices. In the development process Geneko has employed only local intelligence and most recent nowadays technologies.

 

Expert team of engineers has been working on hardware and software for the devices for a very long time now. Software for the devices is written in three program languages (Java, C and Microchip Assembler) for the optimal relations between reliability, precision, development speed and fulfillment of new desires and needs required by the market.

 

Modules and processors used for the hardware are the cutting-edge technology equipment provided by such companies as Siemens, u-Blox, ST and Microchip. Technology used for development and production of devices have surpassed everything that other companies in our region have been developing, producing and selling.

 

Geneko FOX devices are a part of Fox Fleet Management System (FMS) which consists of AVL devices installed into vehicles, Fox Server placed in the Monitoring center, customer’s working stations (GPS Vehicle Tracking Software) and communication infrastructure provided by mobile GSM network and Internet.

 

FOX Devices are designed and developed with focus on our customers’ needs. Highly reliable equipment comes with full customer support. Skilled and professional personnel are working hard every day to make these outstanding products even better.

 

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