Sungrow Logger1000B User Manual page 79

User Manual
8.3.1.5 Digital Input
When using the digital signal at the DI port of the Logger1000 as the dispatching input, set
the active control mode to Digital input.
step 1 Click Power control→Active power to enter the active power interface.
step 2 Set the active control mode to Digital input.
step 3 Set DI control parameters. For specific parameter description, refer to the following table.
table 8-6 Parameter description
Parameter
Communication abnormality
output (%)
Control method
Select energy meter*
Control cycle
Q-Method
Note: *Only when the control method is set to Closed-loop control, the parameter Select
energy meter is settable.
step 4 Add digital input manner.
Select the desired DI channel, fill in the Percentage (Fixed Value of Active Power), and
click Save.
- - End
Description
Communication is abnormal, and specified dispatch output
value is delivered.
Open-loop control: Active instruction controlled by DI is
sent to the power output port of the inverter, thereby
achieving active power control.
Closed-loop control:
• In case no Smart Energy Meter is selected, active
instruction controlled by DI is used as target value, and
active power compensation ratio is calculated and sent
to the power output port of the inverter. Generally, this
strategy is used for fast and accurate active power
regulation.
• In case a Smart Energy Meter is selected, active
instruction controlled by DI is used as target value,
active power of the meter needs to be collected and
used as input
compensation ratio is calculated and sent to the power
output port of the inverter. Generally, this strategy is
used for anti-backflow or avoiding zero power feed-in.
Unselected
Select Smart Energy Meter involved in power regulation
Time interval of delivering dispatching instructions
Parameter range: 5~60s
kW: set active power value.
%: set active power percentage.
8 Grid Dispatching Function
parameter, and active power
69