E6581301

F-17

6
Time [s]
DC braking start frequency H
Output frequency [Hz]
LED display
Operation signal (F-CC) ON
OFF
Output current [A]
0
0
Set frequency
Operation standby signal (ST-CC)
(SW1 set to sink logic)
ON
OFF
H
2
FD is displayed.
FDQP is displayed.
H
Note 1: If the motor shaft fixing control parameter H is set at (enabled) when the output frequency is below
the DC braking start frequency H and terminals ST-CC are closed (ON), the D C braking function is
activated and the motor shaft fixing control continues regardless of th e setting of the DC braking time
parameter H.
Note 2: If a power failure occurs during motor s haft fixing control and the motor starts to a coast, motor shaft fixing
control will be canceled. Also, if the inverter trips during motor shaft fixing contr ol and is restored to working
order by the retry function, motor shaft fixing control will be cance led.
6.8.3 Function of issuing a 0Hz command during a halt!
!!
!
HHHH
: 0Hz command output selection

• Function

This function controls the motor in the zero-speed state at the time of stop. If this function is set up, the

0Hz command will be put out instead of DC braking at the time of a stop,and a motor will be controlled in

the setting time stop state. The monitor display serves as FD during this control operation. This function

operates only at the time of vector control with a sensor (RV=, ).

Refer to DC braking (Section 6.8.1) for conditions of operation. The position of DC braking is served as an

operation which sets the operation frequency command to 0Hz.

[Parameter setting]
Title
!
Function
!
Adjustment range
!
Default setting
!
H
!
0Hz command output selection
!
: Standard (DC braking)
!
: 0Hz command
!
H
!
DC braking starting frequency
!
~Hz
!

H
!
DC braking time
!
~ sec.
!

Note 1: This function doesn't operate when H =.
Note 2: If this function is set up, motor shaft fi xing control H cannot be used.
Note 3: This function doesn't operate at the ti me of a torque control.
Note 4: This function doesn't operate except RV =, of the vector control mode with a sensor. In order to use this
function, the option board for PG feedback is required. When expect ve ctor control with a sensor RV=, ,
this function operate as DC braking mode (It is the same as H= set ting).
Note 5: Since the reference frequency that wil l suspend the motor abruptly from the state of h igh rotation if (H)
is set up highly, please be careful. A trip may occur according to load conditions.
Note 6: This parameter has a function similar to the DC braking function, which is activated by a command from the
terminal board or an external control device (input terminal function  or , or command from external
control device). To the DC braking function which will be activated if H (jog run stop pattern) is set to
(DC braking), and to the DC braking function which will be activated i f H (emergency stop pattern) is
set to (DC braking), but it issues 0Hz commands instead of DC brakin g commands.