ABB UNITROL 1020 Synchronous voltage regulator

The UN1020 device can be operated and controlled in different ways as described in the

rest of this section.

3.3.2.1 Digital and analog IO

The UN1020 can be controlled by means of digital and analog inputs and can therefore set

up several configurations to fulfill most target applications.  Digital and analog IO has

highest priority and cannot be overridden by any other controls.

3.3.2.2 Keyboard and Panel Display

REM

100.0%     S

AUTO NoLoad

0.00    %  UM

0.00     A    Ie

SETPNT

12:45

MENU

The 4-line display and the 8 keys allow full operation.

All settings can be carried out directly on the unit without

additional equipment:

Configuration of inputs and outputs

 Parameter setting

Display of important measuring values.

The operation of the Panel is described in detail in section

6.3 Panel Operation.

3.3.2.3 Remote Access using MODBUS protocol

The Remote Access feature allows device access and control from local or remote

locations by using MODBUS as application protocol.  The communication can be

performed either via RS485 or Ethernet.  More information about the connection

possibilities can be found in Chapter 3.3.9 - Communication Ports.

Basic features and advantage of Remote Access

 Configuration of parameters and I/O signals.

 Measurement reading.

Setpoint adjustment and PID tuning.

 Possibility to create a custom application that uses Remote Access to fully control the

device.

 Monitor only and full control possible.

The Remote Access feature is fully interoperable with the CMT1000 software;  both

interfaces can access and read from the device at the same moment.  Control permission

(write parameters) is handled automatically by the AVR microcontroller.  The Remote

Access feature is described in detail in Chapter 3.4.6 - Modbus for Remote Access.

It combines performance control and power circuits with a simple mechanical design and provides high performance in a wide range of temperature and vibration conditions.

With built-in dual channel support, advanced load sharing between machines operating in parallel, rotating diode monitoring, automatic synchronizing, and several integrated communication options, this automatic voltage regulator (AVR) is manufactured using the most advanced microprocessor technology and IGBT semiconductors, allowing current output up to 20 ADC for continuous operation.