Description of Function Codes
MD280 User Manual
- 122 -
Function Code Parameter Name Setting Range Default
F3-14 Motor switchover delay 0.1–32.0s 0.1s
F3-15 Startup delay after motor switchover 0.1–32.0s 0.2s
F3-14 is used to set the delay from stop of the AC drive to the time of outputting the
contactor control signal.
F3-15 is used to set the delay from the time when the contactor control signal becomes valid
to the time when the AC drive starts up.
Group F4: Start/Stop Control
Function Code Parameter Name Setting Range Default
F4-00 Start mode
0: Direct start
1: Rotational speed tracking restart
0
0: Direct start
–
If the DC braking time is set to 0, the AC drive starts to run at the startup
frequency.
–
If the DC braking time is not 0, the AC drive performs DC braking first and
then starts to run at the startup frequency. It is applicable to small-inertia load
application where the motor is likely to rotate at startup.
1: Rotational speed tracking restart
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at the tracked frequency. Such smooth start has no impact on the rotating motor. It
is applicable to the restart upon instantaneous power failure of large-inertia load. To
ensure the performance of rotational speed tracking restart, set the motor parameters
in group F1 correctly.
Function Code Parameter Name Setting Range Default
F4-01
Rotational speed
tracking mode
0: From frequency at stop
1: From zero speed
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0
To complete the rotational speed tracking process within the shortest time, select the proper
mode in which the AC drive tracks the motor rotational speed.
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.
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It is applicable to the power-generating load.
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