5.3 Description of Function Codes 5.3.5 H codes (High performance functions)
Starting characteristic (Auto search mode)
Related function codes: H49 (Starting mode, auto search delay time 1)
H46 (Starting mode, auto search delay time 2)
Specify the mode for auto search without stopping the idling motor. The mode can be specified for each restart after
momentary power failure and each start of normal operation. The starting mode can be switched by assigning “STM”
to a general-purpose digital input signal. If it is not assigned, “STM” is regarded to be OFF. (Data = 26)
H09/d67 (Starting mode, auto search) and terminal command “STM” (“Enable auto search for idling
motor speed at starting”)
The combination of starting characteristics H09 and d67 data and the “STM” signal determines whether to perform
the auto search when starting.
V/f control (F42 = 0 to 2)
Sensorless vector control (F42 = 5, 15)
1: Enable (Only at restart
after momentary power
failure)
Starting characteristic
selection “STM”
Restart mode after momentary
power failure (F14 = 3 to 5)
When “STM” is ON, auto search for idling motor speed at starting is enabled regardless of the H09 setting.
( Function codes E01 to E09 data = 26)
By setting 15 for F42, it is automatically set to 2: This is set to enable (At normal start and at restart after momentary
power failure).
Auto search for idling motor speed to follow
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.
Starting
mode (auto
search delay
time 1)
(H49)
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