Data acquisition with Modbus peripheral interface unit

Primož Skubic (2013) Data acquisition with Modbus peripheral interface unit. EngD thesis.

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Abstract

Every process control begins with measuremets of current state and adjustments that depend on measured values. For the purpose of this thesis an embedded system was designed, that can measure both temperature and relative humidity. The system is able to provide its measurements to the monitoring or controlling system. The main component of the embedded system is a PIC 16F1827 microcontroller connected to a RS-485 driver that provides for serial communication features, digital sensor HYT 271 for temperature and humidity measurement and a RC converter (RC – electrical resistance to electrical current). A complementary application for configuration of the embedded system was also developed using the C# programming language. In the final phase, our embedded system was connected to a HMI display by RS-485 standard and Modbus protocol. The display used for this purpose was a Fatek FV035ST-C10, which acted as a bus master, displaying the measurements taken by the embedded system.

Item Type:

Thesis (EngD thesis)

Keywords:

embedded system, microcontroller, analog-to-digital conversion, Modbus, floating point

Number of Pages:

Language of Content:

Slovenian

Mentor / Comentors:

Name and Surname	ID	Function
izr. prof. dr. Patricio Bulić	255	Mentor

Link to COBISS:

http://www.cobiss.si/scripts/cobiss?command=search&base=50070&select=(ID=9764436)

Institution:

University of Ljubljana

Department:

Faculty of Computer and Information Science

Item ID:

1998

Date Deposited:

19 Mar 2013 09:22

Last Modified:

10 Apr 2013 08:48

URI:

http://eprints.fri.uni-lj.si/id/eprint/1998

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