Chapter 4 explanation of functions – Hitachi SJ700-2 User Manual
Page 126
Chapter 4 Explanation of Functions
(1) Signal output when the constant-speed frequency is reached (01: FA1)
The inverter outputs the signal when the output frequency reaches the frequency specified by a frequency
setting (F001, A020, A220, or A320) or multispeed setting (A021 to A035).
4 -
63
(2) Signal output when the set frequency is exceeded (02: FA2 or 24: FA4)
The inverter outputs the signal when the output frequency exceeds the acceleration or deceleration
frequency specified by a frequency setting ("C042" or "C043" [FA2] or "C045" or "C046" [FA4]).
(3) Signal output only when the set frequency is reached (06: FA3 or 25: FA5)
The inverter outputs the signal only when the output frequency reaches the frequency specified by a
frequency setting ("C042" or "C043" [FA3] or "C045" or "C046" [FA5]).
f
off
f
on
Output frequency
1
Set frequency
fon: 1% of maximum frequency
f: 2% of maximum frequency
fof
(Example)
Maximum frequency (fmax) = 120 Hz
Set frequency (fset) = 60 Hz
fon = 120 x 0.01 = 1.2 (Hz)
foff = 120 x 0.02 = 2.4 (Hz)
At acceleration, the signal turns on when the output
frequency reaches 58.8 Hz (60 - 1.2 = 58.8).
At deceleration, the signal turns off when the output
frequency reaches 57.6 Hz (60 - 2.4 = 57.6).
C042
FA
/C045
C043/C046
f
on
f
off
fon: 1% of maximum frequency
foff: 2% of maximum frequency
Output frequency
2/FA5
FA
f
on
f
on
f
off
f
off
C043/C046
/C045
C042
requency
3/FA5
fon: 1% of maximum frequency
foff: 2% of maximum frequency
Output f
FA