Hitachi L300P Series Instruction Manual Supplement page 4

L300P Supplement
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
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
Frequency during
the loss of O, OI, or
O2 input
FW/RV
Output frequency
O, OI, or O2 input
Function code Set value
P050
500ms
loss
P020
A020/A220 : 1
b082
Function disabled
00
01 Frequency = 0 Hz (1)
02 Frequency = maximum frequency (2)
03 Frequency = 1
(parameter No.A020/A220) (3)
(2)
(3)
(1)
resumption
2
Explanation of functions
Related Functions
:Freq. During Loss of O/OI/O2
st nd
/2 /multi-stage speed
: Start frequency adjustment
Description
st nd
/2 /multi-stage speed
start frequency
(b082)
500ms