Omron J7 series, User Manual

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Multi-function I/0
Chapter 5-9
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 commercial power
supply operation to Inverter operation, when starting with the Inverter a motor
turned by external force, etc.
The speed search function searches for the present motor frequency, from
high frequency to low. When the motor’s rotation speed is detected, it is
accelerated from that frequency to the frequency reference according to the
acceleration/deceleration time setting.
Forward (reverse)
RUN command
Speed Search command
Output frequency
High-speed frequency
or set frequency
(frequency reference)
Minimum base block time (0.5 s) Speed search operation
ON
0.5 s min.
ON
Time
Time
Time