Overview
The Mark VIe control was introduced in 2004 for use on gas and steam turbines as a turbine control system for generator and mechanical drives and plant control. It is a complementary control to the Mark VI with enhancements for distributed I/O and dual redundancy. Like the Mark VI, it has a wide application range from small governors to plant DCS applications.
Applications
Architecture
The Mark VIe has 100 percent networked I/O that can be clustered or distributed with individual I/O. This flexibility is augmented with local processors on I/O modules for fast execution of critical loops. Computational power grows as I/O is added. The main processor board contains both internal and external Ethernet drivers and is located in a small Compact PCI® board rack.
Redundancy
Control systems are available in simplex, dual, and triple redundant configuration. Redundant systems feature software voting for maximum fault tolerance, precision diagnostics to minimize mean-time-to-repair, and on-line repair to maximize system availability.
Networks
Ethernet is used at all levels, including I/O networks, control networks with peer-to-peer communications between units, and plant network interfaces. I/O networks use 100MB Ethernet.
Software
ToolboxST™ maintenance and configuration software is used for the complete system, from board level diagnostics on turbine and generator controls to network operator stations and printers. Application software is represented in function block and ladder diagram formats with dynamic data that can be dragged-and dropped between blocks or to trends with video type forward-reverse-freeze features.
I/O Types
I/O types are available for both general-purpose I/O devices and the unique sensors and actuators used to control and protect turbines. A variety of industry standard protocols are supported for additional I/O flexibility.
