Huawei SDongleA-05 - Page 43

Parameter Description
Power
adjustment
period
N/A Species the shortest interval for a
single export limitation adjustment.
Maximum
protection time
N/A ● Species the time for detecting
power meter data. If the Smart
Dongle does not detect any power
meter data within the preset time,
the Smart Dongle delivers the
preset value of the Fail-safe
power threshold to the inverter
for protection.
● The recommended value is 5s or
greater.
Power control
hysteresis
N/A Species the dead zone for adjusting
the inverter output power. If the
power uctuates within the power
control hysteresis, the power is not
adjusted.
Communication
disconnection
fail-safe
● Disable
● Enable
In the inverter export limitation
scenario, if this parameter is set to
Enable, the inverter will derate
according to the active power
derating percentage when the
communication between the inverter
and the Smart Dongle is
disconnected for a period longer than
Communication disconnection
detection time.
Communication
disconnection
detection time
N/A Species the time for determining
the communication disconnection
between the inverter and the Smart
Dongle. This parameter is displayed
when Communication
disconnection fail-safe is set to
Enable.
Active power
output limit for
fail-safe
N/A Species the derating value of the
inverter active power by percentage.
If the Smart Dongle does not detect
any power meter data or the
communication between the Smart
Dongle and the inverter is
disconnected, the Smart Dongle
delivers the derating value of the
inverter active power by percentage.
FusionSolar Smart PV Management System
Connection
User Manual (Inverters + SDongleA) 5 Site Deployment and Commissioning
Issue 02 (2021-11-25) Copyright © Huawei Technologies Co., Ltd. 37