The paper is to deal with the analysis of Profinet IO networks based on the design of a watertight door control system on a passenger ship. The analysis was based on modernization of existing watertight door system installed on a ship. The currency system on ship it use old PLC like S7-200, receive and send date only serial communication. In laboratory on University conditions the same network using two controls company Siemens PLC S7-1214 DC/DC/DC and simulated HMI write on WinCC was recreated and modified with Profinet IO standard. The authors propose a novel watertight door control system using two controllers and a touch panel HMI. The control algorithms have been written in LAD language with use norm SOLAS about list alarm. Program it was write in TIA Portal with use Function blocks (FB) with Block Date (DB) and Function (FC). When designing the laboratory bench, the authors based their assumptions on the actual solutions used on the Balmoral passenger ship. Tests were carried out on parameters related to dimensions, including the length of cables between communication modules of controllers, giving in results the actual lengths of cables in the current system and the one proposed in this work. Then, the possibility of data exchange between the two controllers and the visualization of the simulated KTP 1200 panel was examined. The operation of the software was verified, including its optimization for the correct operation of the entire system. The final part of the paper, after verifying the performance of the system in three steps, an analysis of the current system and the novel solution based on Profinet IO network is given.
The paper concerns an alternative ways of object control using S7 1200 controller. Author’s solution is based on an external Matlab program with Simulink extension. Standard ways of controlling an object with the use of a controller to control and analyze the operation of this object use either the controller itself or a graphical representation of the system using an HMI operator panel. An alternative way of controlling a three-phase electrical motor using an external software Matlab with Simulink extension was invented and created in the university laboratory. Algorithm of controlling the object has been created in Matlab environment, through which it is possible to control the object and to read parameters of voltage, output current or even torque. The program is fully compatible with TIA Portal software, which uses TSEND_C and TRCV_C function blocks to exchange data with a PC running Matlab. The entire control process is based on the TCP protocol, while the object is connected through the inverter to the controller using the Modbus RTU protocol. A comparison of the presented solution with currently used solutions has been made. At the end of the article, all advantages and disadvantages of the discussed solution are presented, as well as personal comments on the solution.
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