ABB UNITROL 1020 - Page 36

Chapter 3 - Device Overview 
28 3BHS335648 E82 UNITROL 1020 User Manual
Output Function
Description
(
Requires Synchronization
SW)
- Angle is in a value where it would take the Total CB Closing Time for
the breaker to close at zero degrees with current speed and
acceleration.
- Sync Check demand active
- The command is active as long as the command Sync Check is active
Sync Check (Requires
Synchronization SW)
Sync Check demand to be active:
- Generator circuit breaker is open
- Machine voltage is higher than 50%
- Synchronization is possible (unit with Sync-Option)
- Synchronize is enabled
- Slip is between minimum slip and maximum slip
- Machine voltage is deviating from network voltage maximum Delta U
- Angle is between -maximum delta angle and +maximum delta angle
Sync Speed increase
Control signal to governor to increase speed, pulses (Requires
Synchronization SW).
Sync Speed decrease
Control signal to governor to decrease speed, pulses (Requires
Synchronization SW).
Switch Over
Control signal to 2
nd
channel to take over control (Requires Double Channel
SW).
Supervision Trip
Trip indication, depending on the activated monitor functions (Requires
Double Channel SW)
Supervision
Alarm 1
Alarm indication, depending on the activated monitor functions (Requires
Double Channel SW)
Supervision
Alarm 2
Alarm indication, depending on the activated monitor functions (Requires
Double Channel SW)
Monitor Alarm 1
Alarm indication, depending on the activated monitor functions (Requires
Double Channel SW)
Monitor Alarm 2
Alarm indication, depending on the activated monitor functions (Requires
Double Channel SW)
Diode Alarm
Event of open diode (Requires Rotating Diode Monitoring SW)
Diode Trip
Event of a shorted diode (Requires Rotating Diode Monitoring SW)
PSS Active
Indication that PSS is contributing (Requires PSS SW)
Close FCB Command
Close command for FCB
Open FCB Command
Open command for FCB
FRT Detection
Fault ride through indication
(Sudden voltage dip at network)
ExcON status
Indication that Excitation is ON
Softstart Active
Indication that Softstart is still active (ramping up of the SP)
Manual Active
Indication that Manual mode is active
PF VAR Active
Indication that PF/VAR mode is active
3.3.6.1 Polarity
Polarity can be configured for all digital input/output ports separately, and each one has a
separate polarity configuration when configured as input or output. Each DIO port can be
configured as only input or only output at the same time.
3.3.6.2 Forcing Digital Output Signals
Each digital output can be forced for test purposes by inverting its polarity. This will even
work when no output signal is selected.