Free-Run Stop Function (Frs) - Omron SYSDRIVE MX2 SERIES User Manual

5-8 Restart Functions

Free-run Stop Function (FRS)

Activating the free-run stop (FRS) function shuts off the Inverter output, letting the motor go
into free-run status.
This function is effective when you stop the motor using the mechanical brake such as an
electromagnetic. Note that an overcurrent trip may occur if the mechanical brake forces the
motor to stop during Inverter output.
Allocate "11: FRS" to any Multi-function Input Selections (C001 to C007). The moter performs
a free-run stop while the FRS terminal is turned ON.
When the FRS terminal is turned ON and then OFF, the Inverter will restart after an elapse of
the time set in Restart Standby Time (b003). However, the Inverter will not restart if RUN
Command Selection is set to "Digital Operator" (A002 = 02). To restart the Inverter, input the
RUN command.
As the Inverter output method at restart, 0 Hz restart, frequency matching restart or frequency
pull-in restart can be selected by Free-run Stop Selection (b088). (Examples 1, 2, 3)
When Frequency Matching Lower Limit Frequency Setting (b007) is set, the Inverter will restart
at 0 Hz if a frequency below the frequency set here is detected at the time of frequency
matching restart.
The setting of this function will be applied to the FRS terminal, and also when the Inverter is
reset from free-run status.
5
Parameter
C001 to C007
5-103
Function name
No.
Free-run Stop
b088
Selection
Restart Standby
b003
Time
Frequency
Matching Lower
b007
Limit Frequency
Setting
Frequency Pull-in
b028
Restart Level
Frequency Pull-in
b029 Restart
Parameter
Starting
Frequency at
b030
Frequency Pull-in
Restart Selection
Multi-function
Input Selection
Data Description
00 0 Hz restart (example 1)
Frequency matching restart
01
(example 2)
Frequency pull-in restart
02
(example 3)
0.3 to 100.0 Time until restart
Setting of frequency matching
0.00 to 400.0
level
0.20 × Rated
current to Current limit level at frequency
2.00 × Rated
pull-in restart
current
0.1 to 3000.
00 Frequency at interruption
01 Maximum frequency
02 Set frequency
FRS: Free-run stop
11
SYSDRIVE MX2 Series USER'S MANUAL (3G3MX2-Axxxx)
Default
Unit
setting
00 −
1.0 s
0.00 Hz
INV
rated A
current
0.50 s
−
00
− −