Omron RX - Page 174

4-69
4-2 Function Mode
4
Functions
Free-run Stop Selection
•Activating the free-run stop (FRS) function shuts off the Inverter output, letting the motor go into
free-run status.
•Helps stop the motor using a mechanical brake such as an electromagnetic one.
Note that an overcurrent trip may occur if the mechanical brake forces the motor to stop during
Inverter output.
•Allocate 11 (FRS) to any of multi-function inputs 1 to 8 (C001 to C008).
•Performs a free-run stop (FRS) while the FRS terminal is turned on.
When the FRS terminal is turned off, the motor restarts after the retry wait time (b003) elapses.
However, if RUN command selection A002 is set to "02" (Digital Operator), the Inverter does not
restart.
To restart the Inverter, input the RUN command.
•You can select as the Inverter output mode for restart a 0-Hz start, frequency matching start or
Active Frequency Matching restart at free-run stop selection b088. (Examples 1, 2, 3)
•If you set frequency matching lower limit frequency setting b007, the Inverter restarts at 0 Hz, when
the Inverter detects a frequency equal to or lower than this setting during frequency matching start.
•The setting of this function is applied to the FRS terminal, and also to the status when the Inverter
is reset from free running.
Parameter No. Function name Data Default setting Unit
b088 Free-run stop selection
00: 0-Hz start (example 1)
01: Frequency matching start (example 2)
02: Active Frequency Matching restart
(example 3)
00 
b003 Retry wait time 0.3 to 100: Time before restart 1.0 s
b007
Frequency matching lower
limit frequency setting
0.00 to 400.0:
Set a frequency matching level.
0.00 Hz
b028
Active Frequency
Matching restart level
0.20 × Rated current to 2.00 × Rated
current
Rated current A
b029
Active Frequency
Matching restart
parameter
0.10 to 30.00 0.50 s
b030
Starting frequency at
Active Frequency
Matching restart
00: Frequency at interruption
01: Max. frequency
02: Set frequency
00 