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<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.
OFF
ON
LX
STF
(
STR
)
OFF
Output fre
q
uenc
y
Z
ero speed control
o
r servo lock
DC d
y
namic brake
operation fre
q
uenc
y
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.
OFF
LX
STF
(
STR
)
OFF
OFF
Output fre
q
uenc
y
Zero speed control
or servo lock
DC d
y
namic brake
operation time
If a start is made during zero speed control or servo lock, online auto tuning is not activated.