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800xA for Symphony Plus Harmony communicates with the control systems  through a Cnet-to-computer interface (IET800, PNI800). 

800xA for Symphony Plus Harmony is a distributed process management and  control system. 

Using a series of integrated Harmony control units, the system  allows monitoring and control of process variables such as flow rate, 

temperature,  and pressure according to a control configuration that the engineer or technician  defines. 

A Harmony control unit is a controller and its I/O devices connected for  communication on control network (Cnet). 

800xA for Symphony Plus Harmony operates in a Windows environment on  personal computer hardware. 

Using interactive process graphics, the operator can  monitor and control all Analog loops and Digital devices interfaced to the network  through Harmony control units.

800xA for Symphony Plus Harmony provides maintenance personnel with the  capability to globally monitor

the operating status of any system component on the  network, and to diagnose component failures from any workstation. 

800xA for Symphony Plus Harmony also provides the Harmony Executive Service. 

It is an 800xA service that controls underlying 800xA for Symphony Plus Harmony  services.

UNITROL® 6000, 5000 and F critical spare parts

Having critical spare parts on-hand can significantly reduce the downtime associated with excitation maintenance, 

forced outages, electrical and mechanical failures. As a minimum for operational reliability, 

it is essential to have critical spare parts and components readily available. 

Excitation services provides you with a complimentary recommended spare part list and takes care of testing, 

maintaining and adjusting your spare part stock. We will also keep you informed about critical ageing processes of vital components.
Excitation Care

Power plants have three service needs in common: emergency support, proactive maintenance and performance optimization. 

Excitation Care is designed to fulfill these common needs, is part of Power Generation Care and can be seamlessly integrated in these contracts. 

Excitation Care offers three different levels of support: Rapid Response, Life
Cycle Management and Performance Improvement. The Excitation Care program provides peace of mind and reassurance to your maintenance team.

Key features

• Unlimited phone support 365 days a year with access to ABB product experts
• On-site troubleshooting dispatch prioritization
• Proactive maintenance programs (Performance Review)
• Availability of field labor and spare parts (discounted hourly rates and prices)
• Access to ABB University training programs (reduced fees)
• Product Lifecycle management
• Control upgrade solutions designed to extend the life of the system

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