5-101
H07 Acceleration/Deceleration Pattern (Refer to F07.)
H08 Rotational Direction Limitation
H08 inhibits the motor from running in an unexpected rotational direction due to miss-operation of run commands,
miss-polarization of frequency commands, or other mistakes.
Data for H08 Function
0 Disable
1 Enable (Reverse rotation inhibited)
2 Enable (Forward rotation inhibited)
Under vector control, some restrictions apply to the speed command. Under vector control without speed sensor, a
speed estimation error caused by a motor constant error or other errors may slightly rotate the motor in the direction
other than the specified one.
H09
d67
Starting Mode (Auto search) H49 (Starting Mode, Auto search delay time 1)
Starting Mode (Auto search) H46 (Starting Mode, Auto search delay time 2)
H09 specifies the starting mode--whether to enable the auto search for idling motor speed to run the idling motor
without stopping it.
The auto search can apply to the restart of the inverter after a momentary power failure and the normal startup of the
inverter individually.
If the terminal command
STM ("Enable auto search for idling motor speed at starting") is assigned to a digital input
terminal with any of E01 to E07 (data = 26), the combination of the H09 data and the
STM command status switches
the starting modes (whether auto search is enabled or disabled). If no
STM is assigned, the inverter interprets STM as
being OFF by default.
H09/d67 (Starting mode, auto search) and terminal command STM
("Enable auto search for idling motor speed at starting")
The combination of H09/d67 data and the STM status determines whether to perform the auto search as listed below.
Function code Drive control Factory default
H09 V/f control (F42 = 0 to 2) 0: Disable
d67 Vector control with speed sensor (F42 = 5) 2: Enable
Auto search for idling motor speed at starting
Data for H09/d67 STM
For restart after momentary
power failure (F14 = 3 to 5)
For normal startup
0: Disable OFF Disable Disable
1: Enable OFF Enable Disable
2: Enable OFF Enable Enable
― ON Enable Enable
When STM is ON, auto search for idling motor speed at starting is enabled regardless of the H09/d67 setting.
Refer to E01 to E07 (data = 26).
Auto search for idling motor speed
Starting the inverter (with a run command ON,
BX OFF, auto-reset, etc.) with STM being ON searches for the idling
motor speed for a maximum of 1.2 seconds to run the idling motor without stopping it. After completion of the auto
search, the inverter accelerates the motor up to the reference frequency according to the frequency command and the
preset acceleration time.
Auto search for idling motor speed to follow
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