5.4 Details of Function Codes
5-184
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.
Table 5.4-113
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
Start Characteristics (Auto Search Mode)
Related Function Code: H49 Start Characteristics (Auto Search Wait Time 1)
H46 Start Characteristics (Auto Search Wait Time 2)
H09 sets 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. In addition, by assigning the starting characteristics
selection STM to the general-purpose digital input signal, the starting characteristics can be switched. If STM
is not assigned, the inverter interprets STM = off. (Data = 26)
Starting characteristics (auto search mode) (H09/d67) and Select starting characteristics STM
Whether auto search is executed at the time of starting the operation can be selected by the starting
characteristics H09/d67 and select starting characteristics STM signal.
Table 5.4-114
Function
Code
Effective Mode Default Setting
H09
V/f control (F42 = 0 to 2) 0: Auto search disable
d67
Vector control without speed sensor (F42 = 5) 2: Auto search enable
Table 5.4-115
Starting Characteristics
H09/d67
Data
Select Starting
Characteristics STM
For restart after momentary
power failure (F14 = 3 to 5)
For normal startup
0: Disable
OFF Auto search disable Auto search disable
1: Enable
OFF
Auto search enable Auto search disable
2: Enable
OFF
Auto search enable Auto search enable
― ON Auto search enable Auto search enable
When starting characteristics STM is assigned, auto search is enabled regardless of the H09/d67 setting.
(
Function code E01 to E09, data = 26)
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