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PLC Control Systems

Programmable Logic Controllers (PLCs) are well equipped to deal with a large range of automation tasks. These are typically industrial processes in manufacturing where the cost of developing and maintaining the automation system is high relative to the total cost of the automation, and where changes to the system would be expected during its operational life.

PLCs contain input and output devices compatible with industrial pilot devices and controls; little electrical design is required, and the design problem centres on expressing the desired sequence of operations in ladder logic (or function chart) notation. PLC applications are typically highly customised systems, so the cost of a packaged PLC is low compared to the cost of a specific custom-built controller design.

The PLC’s we supply are products destined for international companies of high repute with spares and support available on a worldwide basis. They include Rockwell Allen-Bradley, General Electric, Schneider/Modicon, Mitsubishi, Square D, Siemens Omron and Toshiba and can be standalone or networked utilising DH+ Modbus, Profibus, Devicenet, ASi systems and Ethernet.

Sequential relay control, motion control, process control, distributed control systems and networking.

The functionality of the PLC has evolved over the years to include sequential relay control, motion control, process control, distributed control systems and networking.

The data handling, storage, processing power and communication capabilities of some modern PLCs are approximately equivalent to desktop computers. PLC-like programming combined with remote Input/Output hardware allow a general-purpose desktop computer to overlap some PLCs in certain applications.

Supervisory and data acquisition requirements are met by the implementation of PC based systems and operator interface / HMI terminals supplied by the above listed PLC manufacturers and other third party suppliers i.e. Intouch, Factorylink and FIX DMACS.

Programmable logic controller