synchronously. Generally, the value
needs to be greater than P15.19 so that
the system can report the underload
alarm when the underload run time is
reached and then reset can be performed
when the time (P15.21–P15.19) elapsed.
If the value of P15.21 is the same as that
of P15.19, auto reset is performed at the
same time as the underload alarm is
reported.
0.00–200.00Hz
P15.22 is the lag frequency threshold,
used to determine the underload run
condition. Currents are compared only
when the absolute value of target
frequency minus ramp frequency is
continuously less than or equal to this
parameter.
0.0–3600.0s
Time setting on weak-light delay.
When the output frequency is less than
or equal to the PI output frequency lower
limit and the delay counting is started,
which reaches the weak-light delay time,
the system reports the weak-light alarm
(A-LS) and then sleeps. In the
non-continuous situation, the delay
counter is automatically cleared.
Note: When the bus voltage is lower than
the undervoltage point or the PV voltage
is lower than 70V, the system directly
reports the weak-light alarm without any
delay.
When P15.32=0, in weak-light condition,
the system automatically switch to the
power-frequency input mode.
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