Description of Function Codes
MD380 User Manual
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• 0: From frequency at stop
It is the commonly selected mode.
• 1: From zero frequency
It is applicable to restart after a long time of power failure.
• 2: From the maximum frequency
It is applicable to the power-generating load.
Function Code Parameter Name Setting Range Default
F6-02 Rotational speed tracking speed 1–100 20
In the rotational speed tracking restart mode, select the rotational speed tracking speed. The
larger the value is, the faster the tracking is. However, too large value may cause unreliable
tracking.
Function Code Parameter Name Setting Range Default
F6-03 Startup frequency 0.00–10.00 Hz 0.00 Hz
F6-04 Startup frequency holding time 0.0–100.0s 0.0s
To ensure the motor torque at AC drive startup, set a proper startup frequency. In addition,
to build excitation when the motor starts up, the startup frequency must be held for a certain
period.
The startup frequency (F6-03) is not restricted by the frequency lower limit. If the set target
frequency is lower than the startup frequency, the AC drive will not start and stays in the
standby state.
During switchover between forward rotation and reverse rotation, the startup frequency
holding time is disabled. The holding time is not included in the acceleration time but in the
running time of simple PLC.
Example 1:
F0-03 = 0 The frequency source is digital setting.
F0-08 = 2.00 Hz The digital setting frequency is 2.00 Hz.
F6-03 = 5.00 Hz The startup frequency is 5.00 Hz.
F6-04 = 2.0s The startup frequency holding time is 2.0s.
In this example, the AC drive stays in the standby state and the output frequency is 0.00 Hz.
Example 2:
F0-03 = 0 The frequency source is digital setting.
F0-08 = 10.0 0 Hz The digital setting frequency is 10.00 Hz.
F6-03 = 5.00 Hz The startup frequency is 5.00 Hz.
F6-04 = 2.0s The startup frequency holding time is 2.0s.
In this example, the AC drive accelerates to 5.00 Hz, and then accelerates to the set
frequency 10.00 Hz after 2s.
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