N700 Operating Instructions and Parts Manual
9. Explanation of I-Group Function
94
9.2.8
Free-Run Stop (FRS : Free-Run Stop)
(1) By operating the free-run stop (FRS) function, the inverter output is cut off.
(2) The motor wills free wheel under its own momentum.
(3) This function is used when the motor is to be stopped by the use of a brake, like an
electromagnetic brake.
(4) If you stop the motor with a machine brake while the inverter is still outputting to the motor an
over-current trip may occur.
(5) Assign 11(FRS) to the intelligent input terminal.
(6) This free-run stop function will operate when the FRS terminal is ON.
(7) If you turn FRS terminal OFF the inverter will restart after the retry wait time b003 passes.
(8) However when the operation command selection F011 is set to control terminal (1), the
inverter restarts during free-running.
(9) This function will only operate when the FW terminal is ON.
(10) On restart it is possible to select 0Hz start or matching frequency start as output methods with
the free-run stop selection b007. (Example 1), (Example 2)
(11) When you set the frequency setting to match (b007) and the frequency detected is under this
setting
(12) when the free-run stop is released, the inverter is restarted from 0Hz.
(13) The setting of this function is valid for selection b006 on stopping.
Code
Function name
Initial
value
Unit
Setting
range
Contents
0
0Hz : Start (Ex1) in 0Hz
b007 FRS
selection
0
-
1
Equaling frequency start (Ex2)
b018 Retry
wait
time
1.0
Sec.
0.3~100.0
Time until restart after FRS terminal is OFF.
(This is also used for Instantaneous restart.)
b020
Frequency
setting to match
0.00 Hz
0.00~400.0
0.00~99.99/100.0~400.0
This sets the level to match frequency.
(Refer to item of instantaneous stop and restart).
Table 9- 9 Free-Run Stop (FRS)
Fig. 9- 16Occasion that set FRS by 11 in input terminal 1 (I001)
FW
FRS
The number of
motor revolution time
0Hz start
free-run
0
The number of
motor revolution time
free-run
FW
FRS
0
FW
FRS
0
Start equaling
frequency
b018
(Ex1) 0Hz start
(Ex2) Frequency matching start