CONTROLLING MOTORS USING FUNCTIONAL BLOCK DIAGRAM (FBD) PROGRAMMING LANGUAGE

Abstract

Programmable Logic Controllers (PLCs) are industrial computers working with control structured system software equipped with input/output units and communication interfaces suitable for the implementation of command and control schemes of industrial automation systems. It was designed to replace relay control systems and the first commercial PLC was produced by Modicon in 1969. In those years, this device, designed to be used instead of relay control circuits, could only work with basic logic operation commands. After the successful introduction of the first commercial PLC in industry, companies such as Allen Bradley, General Electric, GEC, Siemens, Westinghouse produced PMKs [1]. For the implementation of this work, the 1512C CPU type of the S7-1500 PMK introduced in 2012 by the SIEMENS brand, which has made a small contribution to the PLC market, will be used. The Functional Block Diagram (FBD) programming language created according to the 61131-3 standard of the International Electrotechnical Commission is intended for the sequential operation of engines in the system to be built with the S7-1500 PLC. Networks will be created using 2 methods, "Set", "Reset" and "P", "N" commands, taking into account the electrical locking in the TIA (Totally Integrated Automation) Portal software to control and operate the engines sequentially.