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Control loop tuning today is the key factor for quality improvement and optimization of production costs. Simply replacing old systems with modern technology and networked equipment with high-processing capacity does not necessarily imply an improvement in product quality or an increase in plant productivity. However, according to researches conducted in the Industrial sector, most control loops in automatic operation have tuning problems (Harris et al., 1999; Ruel, 2003; Yu, 2006). Nowadays, systems that aid automatic tuning for control loops can be typically located at two levels in the automation systems hierarchy: they can be installed in the workstations, running together with software control systems and data acquisition or SCADA (Supervisory Control and Data Acquisition) systems; or they can be embedded within a distributed control equipment in the field, for example, in PLCs (Programmable Logic Controllers), smart transmitters, or DCS (Distributed Control System). When embedded, automated tuning systems are usually operated by an adaptive control where the controller’s parameters are continuously adjusted to accommodate changes and process disturbances. Tuning systems already installed in workstations are more advantageous than embedded systems due to their superior processing power and information storage. This characteristic leads to the development of more sophisticated algorithms, and provides additional resources, such as simulation and graphical analysis (Aström & Hägglund, 1995), (Ang et al., 2005). Remote access systems that use the Internet as the means of communication have become widespread in recent years, both in academic researches and industrial applications. Studies such as (Avoy et al., 2004) show great potential to growth and diversification of remote applications mainly in industrial environments. Among the advantages of remote access via the Internet in industrial applications, it is important to highlight: enterprises with distributed units can access, share, analyze and process plant floor information in real time and faster; and technical or specialized administrative services can be outsourced with a higher level of interaction between partners, thereby avoiding the need for experts in the staff. Studies in the Literature report proposals and systems for automatic tuning and dynamic control that use the communication via the Internet in different ways (Yu et al. 2006) (Yang

Remote-Tuning – Case Study of PI Controller for the First-Order-Plus-Dead-Time Systems