SV-iS7 User Manual - Inverter Drive Supermarket

Chapter 8 Applied Functions
8.1.19 Speed search operation
This is used to prevent a failure that might occur when the inverter outputs voltage during the motor idling with the
output voltage of the inverter blocked.
It is not accurate speed detection since the rotation speed of the motor is easily judged on the basis of output current
of the inverter.
Group Code No. Function Display Initial Setting Display Unit
CON
OUT
8-36
71 Speed Search - 0000 Bit
72 SS Sup-Current -
Below 75 kW 150
Below 90 kW 100
73 SS P-Gain - 100 -
74 SS I-Gain - 200 -
75 SS Block Time - 1.0 Sec
31~32 Relay 1, 2 19 Speed Search -
33 Q1 Define - -
CON-71 Speed Search : The following four types of speed search can be used. If the dot of the displayed switch is up,
the corresponding bit is set and if the dot of the displayed switch is down, it is not active.
Bit Set(ON) : Bit Not Set(OFF) :
Setting Function
Bit4 Bit3 Bit2 Bit1 Bit 1 is on the far right of the display.
� Speed search selection in acceleration
� Reset starting after a trip
� Re-starting after an instantaneous interruption
� Simultaneous starting at the time of power ON
1) Speed Search Selection in Acceleration
If bit 1 is set at 1 and the inverter operating command is input, acceleration is carried out in the speed search operation. If
voltage is output with an operating command given to the inverter while the motor is rotating according to the load
environment, a trip might occur, thus overworking the motor. In such a case, acceleration can continue without a trip if you
use the speed search function.
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