Browsing by Subject "OPC"

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Access status: Restricted ,
Analiza możliwości realizacji interfejsu HMI sterownika PLC na urządzeniu mobilnym z wykorzystaniem standardu OPC.
(Data obrony: 2019-06-10) Dyszkowski, Piotr
Wydział Elektrotechniki, Automatyki, Informatyki i Inżynierii Biomedycznej
Access status: Open Access ,
Analiza możliwości sterowania rozproszonego z wykorzystaniem technologii GPRS
(Wydawnictwa AGH, 2006) Simicz, Aleksander
This paper presents analysis of transmission delays in GPRS telemetry system. The system is based on MT-101 module. This is industrial controller with SIM card, so it can works in GSM/GPRS cellular phone network. Data are received from the module by GPRS modem which is connected to a main PC computer. Data are transmitted through GPRS network having a form of frames of industrial Modbus protocol. On the main PC an OPC Server is running, making the MT-101's resources accessible. With a wrapper DLL library it was possible to process and visualize data using an application in MATLAB. The main purpose of the research was to compare delays for modes of transmission. The first one was based on sending test packet directly after information about receiving previous packet. On the second case frames was sending with constant time interval, consequently was making transmission delays. The research have showed that the first approach is much better. It is clearly visible on delay histograms. It is possible to develop a distributed control system based on GPRS technology. Dynamical objects controlled in such a way must be asymptotically stable.
Access status: Open Access ,
Implementing ISA S88 for a discrete process with the Bottom-Up approach
(Wydawnictwa AGH, 2008) Linden, Dirk van der
During the nineties, the SP88 committee developed the ANSI/ ISA-S88 standard to improve the maintainability, flexibility, documentation (and other enhancements) of batch control plants. This standard links sequence- and formula- management software (on a computer platform) with control equipment (on a PLC or controller platform) in a structured way. The S88 models are developed to be as universal as possible. The implementation of a discrete process is treated in this paper. The presented application proves that a discrete process can be automated based on the S88 models as well, but the approach can differ from batching. For re-engineering an existing plant, the Bottom-Up is a good approach in general for small applications. The application of this paper introduces basic models and terminology of S88, and guidelines how to implement them.