Parameter Description Remarks
MBUS
communication
For SUN2000 models that support
both RS485 and MBUS
communication, when RS485
communication is used, you are
advised to set MBUS
communication to Disable to
reduce power consumption.
N/A
Upgrade delay Upgrade delay is mainly used in the
upgrade scenarios where the PV
power supply is disconnected at
night due to no sunlight or unstable
at dawn or dusk due to poor
sunlight.
After the SUN2000 upgrade starts,
if Upgrade delay is set to Enable,
the upgrade package is loaded rst.
After the PV power supply recovers
and the activation conditions are
met, the SUN2000 automatically
activates the upgrade.
String monitor The SUN2000 monitors PV strings in
real time. If any PV string is
abnormal (such as the PV string is
shaded or the energy yield
decreases), the SUN2000 generates
an alarm to remind maintenance
personnel to maintain the PV string
in a timely manner.
If PV strings are easily shaded, you
are advised to set String monitor
to Disable to prevent false alarms.
String detection
reference
asymmetric
coecient
Species the threshold for
determining PV string exception. The
false alarms caused by xed shadow
shading can be controlled by
changing this parameter.
This parameter is displayed when
String monitor is set to Enable.
String detection
starting power
percentage (%)
Species the threshold for starting
PV string exception detection. The
false alarms caused by xed shadow
shading can be controlled by
changing this parameter.
Duration for
determining short-
time grid
disconnection (ms)
The standards of certain countries
and regions require that the
SUN2000 should not disconnect from
the power grid if the power grid
experiences a short-time failure. The
SUN2000 output power should be
recovered immediately after the fault
is
rectied.
N/A
7.2.2 Operations Related to the Special User
If you log in to the app as Special User, you can set grid parameters, protection
parameters, feature parameters, and power adjustment parameters for the
SUN2000.
SUN2000-(70KTL, 75KTL)-C1
User Manual 7 Man-Machine Interactions
Issue 09 (2020-10-12) Copyright © Huawei Technologies Co., Ltd. 85
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