LS ELECTRIC SV-iS7 Series, User Manual

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Learning Advanced Features
250
8.19 Speed Search Operation
Speed search operation is used to prevent fault trips that can occur when the inverter voltage
output is disconnected and the motor is idling. Since this feature estimates the motor rotation
speed based on the inverter output current, it does not give the exact speed.
Group Code Name LCD Display Parameter Setting Setting Range Unit
CON
70
Speed search mode
selection
SS Mode 0 Flying Start-1 - -
71
Speed search
operation selection Speed
Search
0000 - bit
72
Speed search
reference current SS Sup-
Current
Up to 75 kW 150
80 – 200 %
Over 75 kW 100
73
Speed search
proportional gain
SS P-Gain 100 0 – 9999 -
74
Speed search
integral gain
SS I-Gain 200 0 – 9999 -
75
Output block time
before speed search SS Block
Time
1.0 0 – 60 sec
OUT
31 – 32
Multi-function relay
1
– 2
Relay 1 – 2
19 Speed Search - -
33
Multi-function
output 1
Q1 Define
Speed Search Operation Setting Details
Code Description
CON-70 SS Mode
Select a speed search type.
Setting Function
0 Flying Start-1
The speed search is carried out as it controls the
inverter output current during idling below the CON-
72 (SS Sup-Current) parameter setting. If the
direction of the idling motor and the direction of the
operation command at restart are the same, a stable
speed search function can be performed at about 10