L300P Supplement Explanation of functions
Inverter Action on Loss of Analog Frequency Reference
Input Signal
Set parameter P050
When the frequency reference is set by the O, OI, or O2 analog
input, if the reference signal remains less than start frequency
(parameter b082) level for more than 500 ms, the inverter assumes
P020 :Freq. During Loss of O/OI/O2
020/A220 : 1
st
/2
nd
/multi-stage speed
b082 : Start frequency adjustment
Related Functions
that the O, OI, or O2 input was lost. Depending on the setting of parameter P50, the inverter will run at a preset
frequency according to the options defined in the following table. Subsequently, if the frequency reference from
O, OI, or O2 input rises higher than the start frequency (parameter b082) and remains at that level for more than
500 ms, the inverter will assume that the O, OI, or O2 input was re-established and resume normal operation.
Set item Function code Set value Description
00
Function disabled
01 Frequency = 0 Hz (1)
02 Frequency = maximum frequency (2)
Frequency during
the loss of O, OI, or
O2 input
P050
03 Frequency = 1
st
/2
nd
/multi-stage speed
(parameter No.A020/A220) (3)
FW/RV
Output frequency
O, OI, or O2 input
(1)
(3)
(2)
start frequency
(b082)
loss resumption
2
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