This thesis deals with study of materials needed for proposing and implementation of the industry state indicator. In the theoretical part there are describe all used components including calculations. Then there is a description of the communication interface used on the indicator. The theoretical part is then followed by a description of MODBUS protocol. The practical part is divided into a few sections. First one decribes the implementation itself together with the idicator activation. Second one describes the programme equipment of microcotroller. The conclusion is about description of the application testing.

Published Article / A company in South Africa is a three-phase induction motor protection relay manufacturer. The function of the protection relay is to capture running data, to provide protection against possible damage, to control an electric motor and to communicate this data to the System Control and Data Acquisition (SCADA) system in a control room. In the case of remote sites e.g. a pump station, the protection relays are used as standalone units. The protection relays are equipped with communication facilities to be used in an instrumentation environment. If a trip occurs or settings need to be changed a technician has to visit the remote site and address the problem. The ideal cost and time effective solution is to perform these tasks remotely via a reliable wireless network. A study was conducted to ascertain the viability of using the standard GSM cellular networks in South Africa to effectively control electric motors and to communicate with the Motor Protection Relays (MPRs) controlling the electric motors in order to determine the status of a motor, settings of the motor, trips that occurred and time of occurrence. It was shown that a node controller could be used to store all the data from various electric motors at a single location. It was also shown that the data from the different electric motors could be analysed at the node controller and that communication can then be initiated from the controller to a responsible person via the GSM network. It was further illustrated that, by making use of the GSM networks in South Africa together with the short message service (SMS), communication and control can be effectively established. SMSs proved to be a reliable means of communication between cellular phones, an embedded network and MPRs. It was shown that software protocols, although slower in communication speed, proved to be reliable and effective for the purpose of transferring information between the node controller and the motor protection relays connected to the electric motors.

International Telemetering Conference Proceedings / October 22-25, 2001 / Riviera Hotel and Convention Center, Las Vegas, Nevada / This article presents a measurement system based on the RS-485 interface. The presented system is an alternative solution for distributed measurement systems, which cannot be built using IEEE-488 interface due to distance limitation between elements of the system. The RS-485 interface is a base for communication between measurement instruments and uses a Master-Slave protocol to exchange data between them. One dedicated master device, usually a PC, controls all slave devices connected to the interface. To control measurement devices SCPI language is used. This solution simplifies communication between measurement devices and allows utilizing the HP-VEE environment to control any SCPI devices connected to the RS-485 network.

This diploma thesis explains the principle of SCADA systems and describes the DLMS/COSEM protocol. In the next part, it shortly describes the Modbus protocol and details the pros and cons of the Modbus protocol in comparison with the DLMS/COSEM protocol. In the next part, an open-source automated scanner was created. This scanner detects devices in a laboratory network. As the next step, the automated scanner finds out open ports and active services, which run on these devices, and tries to attack HTTP, SSH, and Telnet services. Next, the program checks, whether the found device is a smart-meter device and if it is compatible with DLMS/COSEM protocol. If yes, it checks, if the service is vulnerable to DOS attack and breaker disconnection. Scanner’s findings are presented in a newly created web application. NMAP, Masscan, and Metasploit open-source programs are used in the automated scanner. The whole automated scanner is optimized for the HW device Raspberry Pi with the operating system Raspbian Buster Lite installed. This work also describes the testing of the scanner on the laboratory environment and the results are evaluated afterwards.

Made available in DSpace on 2014-12-17T14:55:01Z (GMT). No. of bitstreams: 1 EloiCJ.pdf: 4045636 bytes, checksum: e880bc5df766f908db7bff364ffa3574 (MD5) Previous issue date: 2007-02-15 / This study developed software rotines, in a system made basically from a processor board producer of signs and supervisory, wich main function was correcting the information measured by a turbine gas meter. This correction is based on the use of an intelligent algorithm formed by an artificial neural net. The rotines were implemented in the habitat of the supervisory as well as in the habitat of the DSP and have three main itens: processing, communication and supervision / Este trabalho desenvolveu rotinas de software, em um sistema composto basicamente de placa processadora de sinais (DSP) e supervis?rio, cuja finalidade principal foi corrigir a informa??o medida por um medidor de vaz?o do tipo turbina. Essa corre??o se baseia na utiliza??o de um algoritmo inteligente formado por uma rede neural artificial. As rotinas foram implementadas tanto no ambiente do supervis?rio quanto do DSP e tratam de tr?s ?tens principais: processamento, comunica??o e supervis?o