Chapter 3 - Device Overview
58 3BHS335648 E82 UNITROL 1020 User Manual
Uf@Ie100%
Uf@Ie200%
Uf@Ie300%
Uf@Ie400%
Ufmax
UfLimGain
Vf [%]
Vf [%]
Vf [%]
Vf [%]
Vf [%]
[n]
Uf, Rotor voltage [%]
Ie [%]
Uf@Ie 100%
Uf@Ie 200%
Uf@Ie 300%
Uf@Ie 400%
100% 400%
To set this parameter, refer to 6.4.8 Tune Menu.
3.4.4.4 Double Channel (DCH)
Double Channel (DCH) is an optional feature that integrates supervision or monitor
functions and redundant channel support to build robust and flexible double channel
systems.
The SW-feature is also used for single channel systems in order to force the system into
Manual mode or trip excitation.
Overview
The Double Channel feature has the following main components (Figure 3-10):
1. DCH Supervision / Monitor
The Double Channel Supervision is a feature with 23 supervision functions that
can be used to trigger two Alarms and/or a Trip output from the AVR. The
configuration is performed using a so-called Configuration Matrix.
In addition, 10 monitor functions can be configured in order to control 2 Monitor
Alarm outputs. The monitor Alarm outputs can also be routed to the Supervision
alarm and trip outputs.
With the configuration matrix the customer can define up to 5 independent digital
output signals.
2. Redundant Channel support
Channel changeover, DCH Follow-up and DCH communication
The Channel Changeover is a feature used to transfer the control to the other
channel; normally used when the active channel trips or under special
circumstances (i.e. monitoring alarms) that can be configured in the AVR.
The DCH Follow-Up is a function which is active as long as the AVR is in Standby
mode (i.e. not active), monitoring the setpoint used on the other channel in order
to be ready to takeover in case of changeover. The DCH Follow-up is different
from the Follow-up used to change between operation modes within the same
AVR. For more information see Chapter 3.4.4.4.8 - DCH Follow-Up.
The communication with the second channel is made using the CAN interface and
is called DCH Communication. Throughout the CAN bus, measurements, statuses
and setpoints are transmitted and received from both channels. The data
information can be read from Panel, CMT1000, using Remote Access and is used
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