VP800 Valve Positioner Manual

This document describes the ABB Valve Positioner VP800, an 800 Series turbine module that adds turbine valve control capability to systems like System 800xA via a Profibus interface. It details the device's features, including closed-loop control for hydraulic actuators, integrated valve testing, automatic calibration, and various operating modes such as I/H Converter, Inner-Outer Loop, and Manual Mode.