7
9
Parameter Description
Parameter
(4) Three-wire control mode2 (with self maintaining function):K1: STOP signal, normally close. If K1 is
opened, the inverter will be stoped. K2: RNU signal, normally opened, and the pulse signal is active. If
the external terminal corresponds to the parameters settings for 39, the motor will stop until the user
starts again when reversing.
5. At the external mode, the programmed operation mode is chosen when PO is on. Terminal STF becomes
the start signal. When STF is on, the inverter begins to run at the programmed operation mode at the first
section. When STF is off, the inverter stops running, and STR becomes the pause signal. When STR is on,
the inverter pauses and continues to run at the section where the inverter paused when STR is off. For
details, please refer to
P.100, P.101~P.108, P.111~P.118, P.121~P.123 and P.131~P.138
.
6. At the external mode, the manually operation circle mode is chosen when MPO is on. For details, please
refer to
P.100, P.101~P.108, P.111~P.118, P.121~P.123 and P.131~P.138
.
7. Frequency set by pulse means: the inverter measure and calculate the ON times and OFF times in each
PWM cycle, as its frequency directive.
This function is only for terminal.Near the lowest frequency or maximum frequency, output frequency
precision which relative to the input signal will reduced; avoid the use of requiring a tight frequency
control.
5.36 Slip Compensation Coefficient (P.89) V/F
P.89 “Slip compensation coefficient”
Setting up this parameter appropriately enables the rotation speed of the motor under rated current
to be closer to the set rotation speed.
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P
0 Slip compensation is forbidden
89
0
0~10
10 Compensation value is 3% of the target frequency
STOP(P.8X=31)
K0
K2
K1
STF/STR(P.8X=29)
RUN(P.8X=28)
Operating
Instruction
SD
K0
1
0 Run Forward
Run Reverse
PWM cycle
PWM cycle
ON(Tr)
OFF(Tr)
ON(Tr)
OFF(Tr)
Frequency
（
Hz
）
=
ON times
PWM cycle
× Maximum frequency
（
Hz
）
Relationship between
PWM signals and
frequency
