Hitachi S1 Series Basic Manual page 117

S1 series standard inverter
Function
Name
code
Torque boost of
P04.14
motor 2
Motor 2 torque
P04.15
boost cut-off
V/F frequency
P04.16
point 1 of motor 2
V/F voltage point
P04.17
1 of motor 2
V/F frequency
P04.18
point 2 of motor 2
V/F voltage point
P04.19
2 of motor 2
V/F frequency
P04.20
point 3 of motor 2
V/F voltage point
P04.21
3 of motor 2
V/F slip
P04.22 compensation
gain of motor 2
Low-frequency
P04.23 oscillation control
factor of motor 2
P04.24 High-frequency
Detailed parameter description
4: Torque-down V/F curve (2.0
5: Customize V/F (V/F separation)
Note: Refer to the parameter description of
P04.01 and P04.02.
Setting range of P04.14: 0.0%: (automatic) 0.1%–
10.0%
Setting range of 0.0%–50.0% (relative to rated
frequency of motor 2).
Note: Refer to the parameter description of
P04.03–P04.08.
Setting range of P04.16: 0.00Hz–P04.18
Setting range of P04.17:0.0%–110.0% (rated
voltage of motor 2)
Setting range of P04.18: P04.16–P04.20
Setting range of P04.19: 0.0%–110.0% (rated
voltage of motor 2)
Setting range of P04.20: P04.18–P12.02 (rated
frequency of asynchronous motor 2) or P04.18–
P12.16 (rated frequency of synchronous motor 2)
Setting range of
voltage of motor 2)
This parameter is used to compensate for the
motor rotating speed change caused by load
change in the V/F mode, and thus improve the
rigidity of the mechanical characteristics of the
motor. You need to calculate the rated slip
frequency of the motor as follows:
△f=fb-n*p/60
where fb is the rated frequency of motor 2,
corresponding to P12.02; n is the rated speed of
motor 2, corresponding to P12.03; p is the
number of pole pairs of motor 2. 100%
corresponds to the rated slip frequency △f of
motor 2.
Setting range: 0.0–200.0%
In the V/F mode, current oscillation may easily
occur on motors, especially large-power motors,
at some frequency, which may cause unstable
running of motors or even overcurrent of inverters.
-112-
nd
order)
P04.21:0.0%–110.0%(rated
Default
Modify
value
○
0.0%
○
20.0%
○
0.00Hz
○
00.0%
○
0.00Hz
○
00.0%
○
0.00Hz
○
00.0%
○
100.0%
○
10
○
10