1

Grid code

Set this parameter based on the grid code of the country or region where the device is used.

2

voltage level

Specifies the rated voltage corresponding to the current grid code.

3

frequency level

Specifies the frequency corresponding to the current grid code.

4

Output mode

Specifies supported power grid types.

5

Isolation

Specifies the device grounding status at the DC side and the connection to the power grid.

6

Auto start upon grid recovery

Specifies whether to allow the device to automatically start after the power grid recovers.

7

Grid connection time after power grid recovery (s)

Specifies the time after which the device begins restarting following recovery of the power grid.

8

Quick startup for short-time grid disconnection

Specifies whether to allow the device to quickly start after the power grid recovers from a short-time failure.

9

Duration for determining short-time grid disconnection (ms)

In order to comply with the standards of certain countries and regions, the device should not disconnect from the power grid in cases where the grid experiences a short-time failure. After the fault is rectified, the output power of the device must be quickly restored.

10

Soft start time after grid failure (s)

Specifies the time required for gradual power increase when the device restarts following power grid recovery.

11

Maximum voltage of grid-tied startup (V)

According to the standards of certain countries and regions, initial grid connection is not allowed when the grid voltage is higher than the maximum voltage for grid connection.

12

Minimum voltage of grid-tied startup (V)

According to the standards of certain countries and regions, initial grid connection is not allowed when the grid voltage is below the minimum voltage for grid connection.

13

Maximum frequency of grid-tied startup (Hz)

According to the standards of certain countries and regions, initial grid connection is not allowed when the grid frequency is higher than the maximum frequency for grid connection.

14

Minimum frequency of grid-tied startup (Hz)

According to the standards of certain countries and regions, initial grid connection is not allowed when the grid frequency is below the minimum frequency for grid connection.

15

Grid reconnection voltage upper limit (V)

According to the standards of certain countries and regions, grid reconnection is not allowed when the grid voltage is higher than the maximum grid voltage for grid reconnection.

16

Grid reconnection voltage lower limit (V)

According to the standards of certain countries and regions, grid reconnection is not allowed when the grid voltage is below the minimum grid voltage for grid reconnection.

17

Grid reconnection frequency upper limit (Hz)

According to the standards of certain countries and regions, grid reconnection is not allowed when the grid frequency is higher than the maximum grid frequency for grid reconnection.

18

Grid reconnection frequency lower limit (Hz)

According to the standards of certain countries and regions, grid reconnection is not allowed when the grid frequency is below the minimum grid frequency for grid reconnection.

19

Delay time for connecting automatically to the network

Specifies the time after which the device begins restarting following the power grid recovery.

1

Insulation resistance protection threshold

Insulation resistance protection threshold (MΩ)

To ensure its safety, the device detects the insulation resistance of the DC side to the ground when it starts a self-check. If the detected value is less than the preset value, the device does not connect to the grid.

2

Anti-islanding protection

Active islanding protection

Specifies whether to enable the active islanding protection function.

3

Passive islanding protection

Specifies whether to enable the passive islanding protection function.

4

Voltage protection

Unbalance voltage protection threshold (%)

Specifies the device protection threshold when the power grid voltage is unbalanced.

5

Phase protection point (º)

The Japanese standard requires that during passive islanding detection, protection should be triggered if an abrupt voltage phase change is detected.

6

Phase angle offset protection

The standards of certain countries and regions require the device be protected when the phase angle offset of the power grid three phases exceeds a certain value.

7

10-min undervoltage protection threshold

Specifies the 10-minute undervoltage protection threshold.

8

10-min undervoltage protection time

Specifies the 10-minute undervoltage protection duration.

9

10-min overvoltage protection threshold (V)

Specifies the 10-minute overvoltage protection threshold.

10

10-min overvoltage protection time (ms)

Specifies the 10-minute overvoltage protection duration.

11

Overvoltage protection

Level-N overvoltage protection threshold (V)

Specifies the level-N grid overvoltage protection threshold.

12

Level-N overvoltage protection time (ms)

Specifies the level-N grid overvoltage protection duration.

13

Undervoltage protection

Level-N undervoltage protection threshold (V)

Specifies the level-N grid undervoltage protection threshold.

14

Level-N undervoltage protection time (ms)

Specifies the level-N grid undervoltage protection duration.

15

Frequency protection

Frequency change rate protection

If this parameter is set to Enable, the device is protected when the power grid frequency changes too fast.

16

Frequency change rate protection threshold (Hz/s)

Specifies the frequency change rate protection threshold.

17

Frequency change rate protection time (s)

The device is protected when the grid frequency change duration exceeds the value.

18

Overfrequency protection

Level-N overfrequency protection threshold (Hz)

Specifies the level-N grid overfrequency protection threshold.

19

Level-N overfrequency protection time (ms)

Specifies the level-N grid overfrequency protection duration.

20

Underfrequency protection

Level-N underfrequency protection threshold (Hz)

Specifies the level-N grid underfrequency protection threshold.

21

Level-N underfrequency protection time (ms)

Specifies the level-N grid underfrequency protection duration.

1

Communication failure settings

Communication interruption duration

Specifies the duration for determining communication interruption between the device and the SmartLogger.

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2

Communication interrupt shutdown

The standards of certain countries and regions require the device to shut down after communication is interrupted for a set period.

If this parameter is set to Enable, the device automatically shuts down after the communication interruption duration is reached.

3

Communication resumed startup

If this parameter is set to Enable, the device automatically starts after communication recovers. If this parameter is set to Disable, the device needs to be started manually after communication recovers.

This parameter is displayed when the automatic shutdown upon communication interruption is set to Enable.

4

Communication disconnection fail-safe

If this parameter is set to Enable, the device performs protection according to the set power when communication between the device and the SmartLogger is interrupted for a period longer than Communication disconnection detection time.

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5

Communication disconnection detection time (s)

Specifies the fail-safe detection time for disconnection between the device and the SmartLogger or Smart Dongle.

This parameter is displayed when the protection in the case of communication failure is set to Enable.

6

Active power mode when communication fails

Specifies the protection threshold of the active power after communication is interrupted. The value can be a percentage or a fixed value.

This parameter is displayed when the protection in the case of communication failure is set to Enable.

7

Active power threshold when communication fails (%)

Specifies the active power threshold in percentage.

This parameter is displayed when the protection in the case of communication failure is set to Enable and Active power threshold when communication fails is set to a percentage.

8

Active power threshold when communication fails (kW)

Specifies the active power threshold as a fixed value.

This parameter is displayed when the protection in the case of communication failure is set to Enable and Active power threshold when communication fails is set to a fixed value.

9

Reactive power mode when communication fails

Specifies the protection threshold of the reactive power after communication is interrupted, including Q/S and power factor.

This parameter is displayed when the protection in the case of communication failure is set to Enable.

10

Reactive power threshold when communication fails (%)

Specifies the Q/S threshold of the reactive power (%)

This parameter is displayed when the protection in the case of communication failure is set to Enable and Reactive power threshold when communication fails is set to Q/S.

11

Reactive power threshold when communication fails

Specifies the power factor threshold of the reactive power (PF)

This parameter is displayed when the protection in the case of communication failure is set to Enable and Reactive power threshold when communication fails is set to Power factor.

12

Soft start time

Soft start time (s)

Specifies the duration required for gradual power increase when the device starts.

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13

Shutdown gradient

Shutdown gradient (%/s)

Specifies the power change rate when the device shuts down.

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14

Auto shutdown settings

Shutdown at 0% power limit

If this parameter is set to Enable, the device shuts down after receiving the 0% power limit command. If this parameter is set to Disable, the device does not shut down after receiving the 0% power limit command.

-

15

Hibernate at night

Hibernate at night

The device performs the monitoring function at night. If this parameter is set to Enable, the monitoring function of the device will hibernate at night to reduce power consumption.

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16

Upgrade delay

Upgrade delay

This parameter is mainly used in upgrade scenarios where the power supply at DC side is disconnected.

After the upgrade starts, if Upgrade delay is set to Enable, the upgrade package is loaded first. After the DC side power supply recovers and the activation conditions are met, the device automatically activates the upgrade.

17

RCD enhancement

RCD enhancement

RCD refers to the residual current of the inverter to the ground. To ensure device and personal safety, RCD should be limited to the specified value in the standard. If an AC switch with a residual current detection function is installed outside the inverter, this function should be enabled to reduce the residual current generated when the inverter is running, thereby preventing the AC switch from misoperations.

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18

PID compensation direction

PID compensation direction

When the external PID module compensates the PID voltage for the PV system, set PID compensation direction to the actual compensation direction of the PID module so that the inverter can output reactive power at night.

This parameter is displayed when PV module type is set to Crystalline silicon. Select PV–positive offset for P-type PV modules. Select PV+ negative offset for N-type PV modules.

19

Power quality optimization mode

Power quality optimization mode

If this parameter is set to Enable, the inverter output current harmonics will be optimized.

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20

PID protection at night

PID protection at night

When the inverter outputs reactive power at night and this parameter is set to Enable, the inverter will shut down automatically if it detects abnormal status of the PID compensation.

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21

HVRT/LVRT

HVRT

HVRT is short for high voltage ride-through. When the grid voltage is abnormally high for a short time, the device cannot disconnect from the power grid immediately and must continue to operate for some time.

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22

HVRT triggering threshold (V)

Specifies the threshold for triggering HVRT. The threshold settings should meet the local grid standard.

This parameter is displayed when HVRT is set to Enable.

23

HVRT gradient K1

During HVRT, the device must generate positive-sequence reactive power to support the power grid. This parameter is used to set the positive-sequence reactive power generated by the device.

For example, if you set HVRT gradient K1 to 2, the increment of positive-sequence reactive current generated by the device is 20% of the rated current when the AC voltage increases by 10% during HVRT.

24

HVRT gradient K2

During HVRT, the device must generate negative-sequence reactive power to support the power grid. This parameter is used to set the negative-sequence reactive power generated by the device.

For example, if you set HVRT gradient K2 to 2, the increment of negative-sequence reactive current generated by the device is 20% of the rated current when the AC voltage increases by 10% during HVRT.

25

LVRT

LVRT is short for low voltage ride-through. When the grid voltage is abnormally low for a short time, the device cannot disconnect from the power grid immediately and must continue to operate for some time.

-

26

LVRT triggering threshold (V)

Specifies the threshold for triggering LVRT. The threshold settings should meet the local grid standard.

This parameter is displayed when LVRT or HVRT is set to Enable.

• This parameter is displayed when LVRT or HVRT is set to Enable.
• LVRT recovery threshold = LVRT triggering threshold + VRT exit hysteresis threshold
• HVRT recovery threshold = HVRT triggering threshold + VRT exit hysteresis threshold

27

LVRT gradient K1

During LVRT, the device must generate positive-sequence reactive power to support the power grid. This parameter is used to set the positive-sequence reactive power generated by the device.

For example, if you set LVRT gradient K1 to 2, the increment of positive-sequence reactive current generated by the device is 20% of the rated current when the AC voltage decreases by 10% during HVRT.

28

LVRT gradient K2

During LVRT, the device must generate negative-sequence reactive power to support the power grid. This parameter is used to set the negative-sequence reactive power generated by the device.

For example, if you set LVRT gradient K2 to 2, the increment of negative-sequence reactive current generated by the device is 20% of the rated current when the AC voltage decreases by 10% during HVRT.

29

LVRT active current maintenance coefficient

Specifies the active current proportional coefficient before and during LVRT.

30

Percentage of LVRT reactive current limiting

During LVRT, the device is required to limit the reactive current.

For example, if you set Percentage of LVRT reactive current limiting to 50, the reactive current upper limit of the device is 50% of the rated current during LVRT.

31

Threshold of LVRT zero-current mode

When Zero current due to power grid fault is enabled, if the power grid voltage is less than the value of Threshold of LVRT zero-current mode during LVRT, the zero current mode is used. Otherwise, the mode configured in LVRT mode is used.

32

LVRT mode

Sets LVRT mode. The options are Zero-current mode, Constant current mode, Reactive power priority mode, and Active power priority mode.

33

LVRT characteristic curve

Specifies the low voltage ride-through capability of the device.

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34

Grid voltage protection shield during VRT

Specifies whether to shield the undervoltage protection function during LVRT or HVRT.

This parameter is displayed when LVRT or HVRT is set to Enable.

35

VRT exit hysteresis threshold

Specifies the LVRT/HVRT recovery threshold.

• This parameter is displayed when LVRT or HVRT is set to Enable.
• LVRT recovery threshold = LVRT triggering threshold + VRT exit hysteresis threshold
• HVRT recovery threshold = HVRT triggering threshold + VRT exit hysteresis threshold

36

VRT active current limiting percentage

Specifies the percentage of the maximum active current to the rated current during fault ride-through (FRT).

-

37

VRT active power recovery gradient

Specifies the recovery rate when the active current recovers to the value at the moment before FRT.

-

38

Zero current due to power grid fault

Specifies whether to enable the Zero current due to power grid fault function.

-

39

Zero current due to power grid fault

This parameter can only be set for the VDE4120.

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40

Voltage rise suppression

Voltage rise suppression

The standards of certain countries and regions require that when the output voltage exceeds a certain value, the device must suppress a rise in voltage by outputting reactive power and reducing active power.

-

41

Voltage rise suppression reactive adjustment point (%)

The standards of certain countries and regions require the device to generate a certain amount of reactive power when the output voltage exceeds a certain value.

• This parameter is displayed when Voltage rise suppression is set to Enable.
• The value of Voltage rise suppression active derating point must be greater than that of Voltage rise suppression reactive adjustment point.

42

Voltage rise suppression active derating point (%)

The standards of certain countries and regions require the active power of the device to be derated by a certain slope when the output voltage exceeds a certain value.

-

43

P-U characteristic curve

The device adjusts P/Pn (the ratio of the active power to the rated power) in real time based on U/Un(%) (the ratio of the actual power grid voltage to the rated power grid voltage).

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44

P-U characteristic curve adjustment time

Specifies the time from the response to the end of the adjustment based on the P-U curve.

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45

Frequency modulation control

Frequency modulation control

The standards of certain countries and regions require that if the power grid frequency fluctuates around a certain value, the device needs to fine-tune the active power output based on the frequency regulation ratio to help stabilize the power grid frequency. In this case, set this parameter to Enable.

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46

Adjustment ratio of frequency modulation control

Specifies the adjustment ratio of the active power output.

This parameter is displayed when the frequency regulation control is set to Enable.

47

Response deadband of frequency-based control

Specifies the threshold for triggering the frequency regulation control. For example, if this parameter is set to 0.1 Hz, the frequency regulation control is not triggered when the frequency is within reference frequency±0.1 Hz.

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48

Power change gradient of frequency-based control

Specifies the active power change gradient of frequency regulation.

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49

Power change limit of frequency-based control

Specifies the upper limit for active power adjustment of frequency regulation.

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50

Initial delay in the frequency sensitive mode

Specifies the delay response time of frequency regulation.

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51

Overfrequency derating

Overfrequency derating

If this parameter is set to Enable, the active power of the device will be derated according to a certain slope when the grid frequency exceeds the frequency that triggers overfrequency-caused derating.

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52

Cutoff frequency of overfrequency derating (Hz)

Specifies the frequency threshold for cutting off overfrequency-caused derating.

• This parameter is displayed when the power derating caused by overfrequency is set to Enable.
• The parameter setting should meet the following condition: Quit frequency of overfrequency derating ≤ Trigger frequency of overfrequency derating < Cutoff frequency of overfrequency derating.

53

Cutoff power of overfrequency derating (%)

Specifies the power threshold for cutting off overfrequency-caused derating.

54

Trigger frequency of overfrequency derating (Hz)

The standards of certain countries and regions require the output active power of devices to be derated when the power grid frequency exceeds a certain value.

55

Quit frequency of overfrequency derating (Hz)

Specifies the frequency threshold for exiting overfrequency-caused derating.

56

Power drop gradient of overfrequency derating (%/s)

Specifies the decrease rate of the overfrequency-caused derating power.

57

Power recovery gradient of overfrequency derating (%/min)

Specifies the power recovery rate of the overfrequency-caused derating.

58

Frequency detection filter time (ms)

Specifies the frequency detection filter time.

-

59

Recovery delay of frequency-based active power derating

Specifies the exiting delay time after the frequency reaches the quit frequency of overfrequency-caused derating.

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60

Execution delay of frequency-based active power derating

Specifies the effective delay time of overfrequency-caused derating when the frequency reaches the trigger frequency of overfrequency-caused derating.

-

61

Hysteresis of frequency-based active power derating

Specifies whether to enable overfrequency-caused derating hysteresis.

-

62

Underfrequency rise power

Underfrequency rise power

The standards of certain countries and regions require that when the power grid frequency is lower than the frequency threshold for power raising, the device needs to increase the active power output to help increase the power grid frequency. In this case, set this parameter to Enable.

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63

Power recovery gradient of underfrequency rise power (%/min)

Specifies the power recovery rate of underfrequency-caused raising.

This parameter is displayed when the power raising caused by underfrequency is set to Enable.

64

Cutoff frequency of underfrequency rise power (Hz)

Specifies the frequency threshold for stopping underfrequency-caused raising.

65

Cutoff power of underfrequency rise power (%)

Specifies the power threshold for stopping underfrequency-caused raising.

66

Trigger frequency of underfrequency rise power (Hz)

Specifies the frequency threshold for power raising.

67

Quit frequency of underfrequency rise power (Hz)

Specifies the exit frequency of power raising caused by underfrequency.

68

Delay of underfrequency-caused power raising

Specifies the delay from the time when the underfrequency power raising function is triggered to the time when the function takes effect.

1

Remote control

Remote power schedule

If this parameter is set to Enable, the device responds to the scheduling instruction from the remote port. If this parameter is set to Disable, the device does not respond to the scheduling instruction from the remote port.

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2

Schedule instruction valid duration (s)

Specifies the validity period of the scheduling instruction.

When this parameter is set to 0, the scheduling instruction takes effect permanently.

3

Active power

Plant active power gradient

Specifies the rate of active power rise due to sunlight changes.

-

4

Average active power filtering time (ms)

Specifies the period of active power rise due to sunlight changes. This parameter is used with Plant active power gradient.

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5

Active power change gradient (%/s)

Specifies the change rate of the device's active power.

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6

Active power (kW)

Specifies the fixed active power of the device.

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7

Active power (%)

Specifies the active power of the device in percent.

-

8

Reactive power

Reactive power change gradient (%/s)

Specifies the change rate of the device's reactive power.

-

9

Power factor

Specifies the power factor of the device.

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10

Reactive power compensation (Q/S)

Specifies the reactive power of the device.

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11

Night-time reactive power output

Night-time reactive power output

In some specific application scenarios, a power grid company requires that the inverter can perform reactive power compensation at night to ensure that the power factor of the local power grid meets requirements.

This parameter is displayed when Isolation settings is set to Input ungrounded, with TF.

12

Enable reactive power parameters at night

When this parameter is set to Enable, the inverter outputs reactive power based on the setting of Reactive power compensation at night. Otherwise, the inverter executes the remote scheduling command.

This parameter is displayed when Night-time reactive power output is set to Enable.

13

Night-time reactive power compensation (kVar)

During the reactive power compensation at night, the reactive power is scheduled by fixed value.

This parameter is displayed when Night-time reactive power output and Enable reactive power parameters at night are set to Enable.

14

Q-U characteristic curve

Q-U characteristic curve

The device adjusts Q/S (the ratio of the output reactive power to apparent power) in real time based on U/Un(%) (the ratio of the actual power grid voltage to the rated power grid voltage).

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15

Q-U characteristic curve mode

Specifies the reactive power compensation mode of the device output.

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16

Delay for Q-U characteristic curve to take effect

Specifies the delay time for Q-U adjustment.

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17

Power percentage for triggering Q-U scheduling

Specifies the reference apparent power in percent. When the actual apparent power of the device is greater than the value of this parameter, the Q-U characteristic curve scheduling function is enabled.

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18

Power percentage for exiting Q-U scheduling

Specifies the P/Pn when the device exits the Q-U scheduling.

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19

Limit value for minimum PF of Q-U characteristic curve

Specifies the minimum power factor for Q-U adjustment.

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20

Q-P characteristic curve

Q-P characteristic curve

The device adjusts Q/Pmax (the ratio of the reactive power to the maximum active power) in real time based on P/Pmax (the ratio of the active power to the maximum active power).

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21

PF-U curve

PF-U characteristic curve

The device adjusts the power factor in real time based on U/Un(%) (the ratio of the actual power grid voltage to the rated power grid voltage).

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22

PF (U) voltage detection filter time

Specifies the time for filtering the grid voltage in the PF-U curve.

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23

Cosφ-P/Pn characteristic curve

Cosφ-P/Pn characteristic curve

The device adjusts the output power factor cosφ in real time based on P/Pn (%).

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24

Reactive power compensation (cosφ-P) trigger voltage

Specifies the voltage threshold for triggering reactive power compensation based on the curve.

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25

Reactive power compensation (cosφ-P) exit voltage

Specifies the voltage threshold for exiting reactive power compensation based on the curve.

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26

Reactive power adjustment time

Specifies the adjustment time for the reactive power to reach the target value during reactive power adjustment.

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