<Zero speed control and servo lock timing charts>

1)Zero speed control or servo lock is made valid when the auxiliary exciting terminal (LX) is ON without the start signal (STF, STR) being entered into the inverter (during a stop). Assign the function of the auxiliary exciting

terminal (LX) to any of the terminals using Pr. 180 to Pr. 186.

LX

 

 

 

 

 

ON

 

 

 

 

 

STF(STR)

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DC dynamic brake

 

 

 

 

 

Output frequency

 

 

 

 

operation frequency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Zero speed control

 

 

OFF

 

 

or servo lock

 

 

 

 

 

 

2) Zero speed control or servo lock is made valid when the frequency command is 0Hz (not more than the starting frequency) with the start signal being entered.

LX

 

 

 

 

 

OFF

 

 

 

 

STF(STR)

 

 

 

 

 

OFF

 

 

 

 

 

 

 

 

 

Output frequency

 

 

 

 

 

 

 

 

 

 

 

 

Zero speed control

 

 

 

 

 

OFF

 

 

 

 

or servo lock

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DC dynamic brake operation time

If a start is made during zero speed control or servo lock, online auto tuning is not activated.

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