Fuji Electric FRENIC-HVAC User Manual page 459

H09 (Starting mode, auto search) and terminal command STM

("Enable auto search for idling motor speed at starting")
The combination of H09 data and the STM status determines whether to perform auto search
as listed below.
STM
Data for H09
OFF 0: Disable
1: Enable
2: Enable
ON ―
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
Starting Mode (Auto search delay time 1) (H49)

- Data setting range: 0.0 to 10.0 (s)
Auto search for the idling motor speed will become unsuccessful if it is done while the motor
retains residual voltage. It is, therefore, necessary to leave the motor for an enough time for
residual voltage to disappear. H49 specifies that time (0.0 to 10.0 sec.).
At the startup triggered by a run command ON, auto search starts with the delay specified by
H49. Using H49, therefore, eliminates the need of the run command timing control when two
inverters drive a single motor alternately, allow the motor to coast to a stop, and restart it
under auto search control at each time of inverter switching.
Auto search for idling motor speed at starting
For restart after momentary power
failure (F14 = 3 to 5)
Disable
Enable
Enable
Enable
6-149
6.3 Details of Function Codes
For normal startup
Disable
Disable
Enable
Enable