CHINT NVF2G-S-7.5/TS4 - Restart after power failure; Sleep function

8.19 Timing operation
Every time the inverter is started, it starts timing at 0, and the remaining running time of the timing can be
viewed through Fd.49.
8.21 Sleep function
The sleep function is mainly used in water pump water supply, air supply control and other occasions.
When the sleep level preset by the user is reached, the inverter can output 0 Hz to maximize energy saving.
The sleep function needs to be used in combination with the PID function, and its specific operation process is
shown in Figure 8-21-1 .
If the sleep function is turned on (set F9.30 to 1, and set F9.28 (closed-loop operation mode) to 1 (operation
at shutdown)), the system is in the running state, when the output frequency is detected to be less than or
equal to the sleep frequency (F9 .31), and the duration reaches the sleep delay time (F9.32), it will automatically
enter the sleep state (the inverter runs at 0Hz); when the process closed-loop feedback ( Fd .2 9) is less than
the process closed-loop reference ( Fd .2 8 ), and the error is greater than the wake-up deviation (F9.33), when
the duration reaches the wake-up delay time (F9.34), it will automatically wake up, that is, the system will
automatically exit the sleep state and restart operation.
8.20 Restart after power failure
This function realizes whether the inverter starts running automatically and the waiting time before
automatic running under different running command channels after the inverter is powered off.
function code
name
default value
Predetermined area
Parameter Description
F8.32
Timing function selection
0
0 ~ 1
0: invalid
1: valid
F8.33
Timing run time
0.0min
(0.0 ~ 6500.0) min
-
F8.35
Power failure restart
function selection
0
0 ~ 1
0: invalid
1: Valid
F8.36
Power failure restart
waiting time
0.0s
(0.0～10.0)s
-
function code
name
default value
Predetermined area
Parameter Description
Setting frequency
Sleep frequency
Feedback value
Given value
Difference value
between given and
awake
Awake delay time
Sleep
delay time
Figure 8-21-1 Schematic diagram of sleep and wake-up
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NVF2G-S Series Inverter User's Guide