PROFIBUS in Practice consists of four parts. Part I covers the installation of PROFIBUS devices and cables. Part II looks at PROFIBUS system engineering, troubleshooting and maintenance, Part III PROFIBUS system design and Part IV PROFIBUS operation, protocol and applications. This book is Part II of this series and for engineers and technicians who are involved in commissioning and maintenance of PROFIBUS installations. With networks being installed at the field level, a multi-meter is no longer sufficient. Technicians and engineers need to know what fieldbus engineering tools are available and how to use them for device and network parameterisation, analysis and diagnosis. This book provides a fundamental analysis into PROFIBUS network behaviour and plenty of techniques for troubleshooting, commissioning and maintenance on operational PROFIBUS DP and PA systems.