Huawei SmartLogger3000 User Manual page 99

SmartLogger3000
User Manual
Parameter
Dry contact function
Commanded shutdown hold
after power recovery
Hibernate at night
MBUS communication
RS485-2 communication
Upgrade delay
String monitor
String detection low power delay
(min)
String detection high power
delay (min)
String detection power segment
division percentage (%)
String detection reference
asymmetric coefficient
String detection starting power
percentage (%)
Issue 03 (2020-01-10)
Description
Identifies the dry contact signals from the SmartLogger.
Set this parameter to OVGR for OVGR signals, and set it to NC for other
signals. This parameter is displayed if the Japanese grid code is selected.
The standards of certain countries and regions require that if the inverter is
shut down after receiving a command and powered on again after power
recovers, it should still be in commanded shutdown state.
The inverter monitors PV strings at night. If this parameter is set to Enable,
the monitoring function of the inverter will hibernate at night to reduce
power consumption.
For inverters that support RS485 communication and MBUS
communication, you are advised to set this parameter to Disable to reduce
power consumption.
If this parameter is set to Enable, the RS485-2 port can be used. If the port
is not used, you are advised to set this parameter to Disable to reduce
power consumption.
This parameter 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 inverter starts to upgrade, if Upgrade delay is set to Enable, the
upgrade package is loaded first. After the PV power supply recovers and
the activation conditions are met, the inverter automatically activates the
upgrade.
The inverter monitors PV strings in real time. If any PV string is abnormal
(such as the PV string is shaded or the electric energy yield decreases), the
inverter generates an alarm to remind maintenance personnel to maintain
the PV string in a timely manner.
If PV strings are often shaded, you are advised to set String monitor to
Disable to prevent false alarms.
Specifies the delay time for generating abnormal string alarms when the
inverter detects that a PV string is working with low power. This parameter
is mainly used in the scenario where PV strings are shaded for a long time
in the morning and evening, and is used to prevent false alarms.
Specifies the delay time for generating abnormal string alarms when the
inverter detects that a PV string is working with high power.
Specifies the thresholds for determining whether a PV string is working
with high power or low power. This parameter is used to distinguish the
working status of PV strings.
Specifies the threshold for determining PV string exception. The false
alarms caused by fixed shadow shading can be controlled by changing this
parameter.
Specifies the threshold for starting PV string exception detection. The false
alarms caused by fixed shadow shading can be controlled by changing this
parameter.
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