UNITROL 1020 ABB Automatic Voltage Regulator Excitation System

UNITROL 1020 ABB Automatic voltage regulator excitation system

UNITROL 1020 ABB Automatic voltage regulator excitation system

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800xA Operator Workplace

For SIL Applications, the AC 800M HI provides protection against unauthorized

writing from other computers on the control network. This protection layer is named

“Confirmed Write” and consists of a special communication protocol securing that

correct operation is performed on correct object.

Any attempt to write to variables and parameters belonging to a SIL Application

will be stopped by the AC 800M HI if the “Confirmed Write” protocol is not used.

800xA Operator Workplace supports the “Confirmed Write” protocol and can be

used for both viewing and modifying variables in AC 800M HI. The possibility to

modify variables in SIL Applications are also restricted by the “SIL Access

Control”, see Access Management Settings on page 108.

Maintenance/Engineering Interface

The instructions and procedures given in this manual require the use of Control

Builder M Professional for engineering and application download. Various frontend applications like Reuse assistant or Bulk data manager can be utilized, but the

Control Builder M Professional shall be used as the interface to the AC 800M HI.

The IEC 61131-3 application code shall be compiled before it is downloaded to the

AC 800M HI. Regardless of which editors or programming tools that are utilized to

produce the application source code, the compilation and download shall be done

with the Control Builder M Professional. The procedure described in Program

Download and Startup on page 117 shall be followed.

All data is stored in the Aspect directory of the 800xA system. The engineering

environment supports multiple users, built in functionality for reserving data entities

for modification prevents two users from modifying the same data simultaneously