ABB UNITROL 1020 - Digital Inputs

 Chapter 3 - Device Overview
UNITROL 1020 User Manual 3BHS335648 E82 25
3.3.5 Digital Inputs
Input Function
Description
None
Input not assigned
Excitation ON active
Excitation ON command active:
- Field flashing begins if Off Level > 0%
- Auto mode: Soft start begins after the Off Level has been reached, and
rises up to the Auto Initial Setpoint.
- Other modes: Initial Setpoint is used.
Excitation ON not active
Excitation ON command not active:
All setpoints are immediately set to their
initial values and remain fixed there (see
table on the right).
Auto, Manual and Open loop Initial
setpoints can be changed from there
standard start-up values.
Mode
Initial Setpoint
Auto
100%
Manual
0%
Open Loop
0%
PF
1.0
Var
0%
Gen CB Closed Status
active
Circuit-breaker closed status active:
- Activates current measurement
- This message immediately triggers the ramp of the Soft start as if still the
hold time.
Gen CB Closed Status
no longer active
Circuit-breaker closed status changes
from active to not active. All setpoints are
immediately set to the following values:
Mode
Final Value
Manual
90% Ie No Load
Open Loop
90% 1/Kceil
Auto
100%
Parallel with Grid Status
Parallel with grid status active:
- With Gen CB Closed, enables changeover to PF and Var modes.
- Disables VDC mode.
Connecting unit parallel with grid action:
Depending on Parameter “Enable PF/VAR initial SP”, SP before parallel
with grid status is taken over or SP is changed to initial value.
Disconnecting unit from grid action:
Depending on the parameter “Loose grid go to initial SP”, AUTO SP is
taken from the initial SP instead of keeping the same operation point.
Increase
Increase setpoint of active regulator
Decrease
Decrease setpoint of active regulator
Reset Setpoint
Status reset setpoint is active:
The setpoint of the active regulator goes
to the following value at ramp speed:
Depending on parameter “Reset SP to
initial value”, SP of defined final values or
initial values are taken over
Mode
Final Value
Manual
Ie No Load
Open Loop
100% 1/Kceil
PF
1.0
Var
0%
Auto
100%
Remote SP Enable
When active it enables the setpoint adjustment from an analog input
(remote setpoints should be configured in the Analog Input section).
PF Enable
Activates Power factor regulation. (Requires the PF/VAR SW)
Var Enable
Activates Reactive power regulation. (Requires the PF/VAR SW)
Manual Enable
Activates Manual operation mode (field current regulation).
Open Loop Enable
Open loop, direct control of power transistor active
Synchronize
Activates Synchronization or Voltage Matching: If Synchronization SW
(optional) is not available in the device, the input signal will activate Voltage
Matching only. (Requires Synchronization SW)
VDC Enable
Activates the Voltage Droop Compensation (VDC) control mode. (Requires
Voltage Droop Compensation (VDC) SW)