Emotron VS Series Quick Start Guide
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In some applications, reverse is likely to result in equipment damage. This parameter is used to
prevent reverse running.
Dead time of forward and
reverse
The dead time with 0Hz output during the transition from forward to reverse, or from reverse to
forward. As shown in Fig. 6-4.
Time（S）
Output frequency(Hz)
Dead time of forward
and reverse
Dead time of forward
and reverse
Fig 6-4
Unit’s place: Start mode
0: From start frequency
If the DC braking time（b1.08） is set to 0, the AC drive starts to run at the startup frequency(b1.05)
and keeps this frequency for a period of time set by b1.06, and then accelerated to command
frequency in accordance with the accel method and time..
If the DC braking time （b1.08）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
The AC drive judges the rotational speed and direction of the motor first and then starts 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 correctly.
Ten’s place: Grounding short circuit detection
0: No grounding short circuit detection
No grounding short circuit detection
1: Grounding short-circuit detection before the first start
After inverter power on, when first time received running command, before running, inverter
automatically starts grounding short-circuit detection on output terminal, if there are short circuit faults
between inverter’s output terminal and ground, inverter will alarm Err44 fault.
2: Grounding short-circuit detection before each start
Inverter automatically starts grounding short circuit detection on output terminal before each start,
if there are short circuit faults between output terminal of inverter an ground, inverter will alarm Err44
fault。
Hundred’s place: Track direction
0: Track from zero speed
Under the speed tracking restart mode, when start, inverter track the current speed of motor
slowly from zero to max frequency
1: Track from max frequency
Under the speed tracking restart mode, when start, inverter track current speed of motor slowly
from max frequency to zero
Thousand’s place: Jog command firstly act
0:When normal start and Jog start command comes simultaneously, normal start act firstly;
1:When normal start and Jog start command comes simultaneously, Jog start act firstly;
Ten thousand’s place: Tracking direction
0: Last direction when stop
Tracking direction is the direction which inverter stop with.
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