Keywords
IEC 61131-3
FPGA
HMI
SysML
Abstract
The paper presents an overview of the current functionality of the CPDev (Control Program Developer) engineering environment developed in Department of Computer and Control Engineering at Rzeszów University of Technology. The package is designed for programming PLCs/PACs according to IEC 61131-3 standard. The system is based on the concept of dedicated virtual machines being interpreters of executable code to increase the portability and versatility of control programs. The environment has been enhanced by support of all IEC languages (ST, IL, FBD, LD, SFC), HMI software design integrated with control software, unit testing of software components as well as by ability of modeling the structure and operation of complex programs in SysML. Tool for designing HMI interface is independent of the hardware platform, and allows to combine control with visualization using IEC languages. Table and unit tests allow to increase software quality. Models based on SysML diagrams support the early design stages of control software. New CPDev compiler allows to handle larger programs. In addition to virtual machines run on general-purpose processors, compiled programs can also be executed by FPGA-PLC prototype. Current industrial implementations of the CPDev environment include devices from Lumel S.A. Zielona Gora, Poland (SMC programmable controller), Praxis Automation Technology B.V. Leiden, The Netherlands (Mega-Guard Ship Automation and Navigation System) and Nauka i Technika Sp. z o.o. Zaczernie/Rzeszów, Poland (StTr-760-PLC controller). Brief description of the Praxis Mega-Guard system has been presented as an example of the implementation.
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