Omron SYSDRIVE 3G3MV A2002, User Manual

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5-37
H
Speed Search (Set Value: 14, 15)
·
The speed search function is provided for smooth restarting without stopping a free
running motor. Use it when switching the motor from a commercial power supply op-
eration to Inverter operation, when starting with the Inverter a motor turned by external
force, and so on.
·
The speed search function searches for the present motor speed, from high frequency
to low. When the motor’s rotation speed is detected, it is accelerated from that frequen-
cy to the frequency reference according to the acceleration/deceleration time setting.
Forward (reverse) RUN command
Speed search command
0.5 s min.
High-speed frequency
or set frequency (fre-
quency reference)
Minimum base block time (0.5 s)
Speed search operation
n102: Speed search operating level
n101: Deceleration time
ON
ON
Note
For 5.5- and 7.5-kW Inverters only, the speed search function can be adjusted by setting
parameters n101 (speed search deceleration time) and n102 (speed search operating
level). If the speed search cannot be executed properly using the default setting, length-
en the deceleration time or lower the operating level. To reduce the speed search time,
check with the application while either shortening the deceleration time or raising the op-
erating level.
n101
Speed Search Deceleration
Time
Register 0165
Hex
Changes during
operation
No
Setting
range
0.0 to 10.0 Unit of
setting
0.1 s Default setting 2.0
n102 Speed Search Operating
Level
Register 0166
Hex
Changes during
operation
No
Setting
range
0 to 200 Unit of
setting
1 % Default setting 150
Basic Operation
Chapter 5