Toshiba Q9 Plus ASD, Installation & Operation Manual

Page: 177 / 434

E6581611
E-22
5
2) Restarting motor during coasting (Motor speed search function)
Motor speed
Forward / reverse
ON
OFF
ST-CC
ON
OFF
+ Setting f301 to 2  or 3 : This function operates after the ST-CC terminal connection has been opened
first and then connected again.
Note 1: As the default setting for ST (Standby) is Always ON, change the following settings.
 f110
=
1
(no function)
 Assign 6: ST (Standby) to an open input terminal.
3) Motor speed search at starting
When f301 is set to 4 , a motor speed search is performed each time operation is started.
This function is useful especially when the motor is not operated by the inverter but by the external factor.
Warning!!

At restart, it takes about 1 second for the inverter to check the number of revolutions of the motor.
For this reason, the start-up takes more time than usual.

Use this function when operating a system with one motor connected to one inverter.
This function may not operate properly in a system configuration when multiple motors are connected to
one inverter.

In case of using this function, do not set the output phase failure detection selection
( f605 = 1 , 2 , 4 ).
Application to a crane or hoist
The crane or hoist may have its load to be moved downward during the above waiting time.
To apply the inverter to such machines, therefore, set the auto-restart control mode selection
parameter to "
 =  " (Disabled), Do not use the retry function, either.
Note 2: It is not malfunction that abnormal noise might be heard from the motor during the motor speed
search at the auto-restart.