5-7 Stop Method Settings
5-7-1 Stop Selection
•
Select whether you want the motor to make a deceleration stop according to the deceleration time
setting or a free-run stop, when the STOP command is input via the Digital Operator or the control cir-
cuit terminal block.
•
To use external braking, select Free-run stop.
Using external braking during deceleration stop may cause an overload or overcurrent.
•
If you start the RUN command again during free run, the inverter will restart according to the Free-run
Stop Selection (b088) setting.
5-7-2 Free-run Stop Selection
•
Free-run stop is a method of shutting off the inverter output to stop the motor rotation.
Executing the free-run stop function causes the motor to fall a free-run state, in which it decelerates
due to the load and friction forces exerted on the motor and/or machine and comes to a stop.
•
In the Free-run Stop Selection (b088), set how to restart the motor rotating in a free-run state after the
execution of the free-run stop.
•
The Free-run Stop Selection (b088) setting is enabled for the following cases.
When Stop Selection (b091) is set to 01 (Free-run stop)
Restarting the motor in a free-run stop state when the When Stop Selection (b091) is set to 01
(Free-run stop) causes the motor to restart according to the Free-run Stop Selection (b088) set-
ting.
When free-run stop (FRS) function is used via a multi-function input terminal
Setting the Multi-function Input 1 to 7 Selection (C001 to C007) to 11 (FRS) and turning ON the
corresponding input terminal causes the motor to fall in a free-run stop state (with the inverter out-
put shut off).
Then, when the FRS terminal turns OFF, the motor restarts according to the Free-run Stop Selec-
tion (b088) setting.
However, the motor does not restart when the 1st/2nd RUN Command Selection (A002/A202) is
set to 02 (Digital Operator).
•
Set the Free-run Stop Selection (b088) as follows.
00: 0-Hz restart
Causes the Inverter to restart from 0 Hz.
01: Frequency pull-in restart at shutoff
Frequency pull-in restart causes the inverter to restart by outputting the frequency at shutoff to the
motor in a free-run stop state. When the output current reaches the Frequency Pull-in Restart
Level (b028), the inverter decelerates according to the Frequency Pull-in Restart Parameter
(b029) to suppress the output current. Once the output frequency and the output voltage are bal-
anced, the inverter performs normal operation.
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