ABB PRO-33.0-TL Series, Service Manual

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14 Program features
Control and monitoring interfaces
In basic setup the operation of PRO-33.0-TL inverter does not require any user actions.
Once the inverter is commissioned, automatic functions start and stop the inverter based
on measurements.
In some cases the inverter requires monitoring and additional control. You can control and
monitor the inverter locally from the control unit and remotely through the fieldbus
interface.
The control unit operation and menu structure are described in the PRO-33.0-TL Product
manual (3AUA0000123261 [English]).
Operational description
PRO-33.0.-TL inverter operation follows the state machine described below.
•
MPPT is the normal operational state during power generation.
•
If a power limitation is active, the inverter is in the Limited state while the inverter
produces energy to the grid.
•
When the DC power level from panels is low, the inverter is in the Sleep or Standby
state depending on the night mode settings (parameter 189.07 Night mode ).
•
Connection tests is a state the inverter goes through every time it connects to the grid
and performs tests for DC voltage and internal protection devices.
•
If a fault occurs, the inverter moves to the Standby state and waits for a reset
command (manual or autoreset).
The conditions for state transitions are as follows:
1 VDC > ~300 V
2 Inverter enabled (parameter 189.01 Inverter operation )
AND country code set
AND grid stable
AND VDC > VDC
start
AND VDC < VDC
max
AND no faults
3 VDC > VDC
start
AND ground impedance ok
AND grid relay ok
4 Available power is greater than the inverter’s power limit (parameter
130.01 Limit word 1 )
P
lim
< P
act
Sleep Standby Connection MPPT
tests
Limited