Veichi JT550 Series Manual page 102

Chapter 7 Maintenance and Troubleshooting
F6.25 Filter Time of V/f Slip Compensation
Used to set the filtering time of V / F slip compensation.
F6.26 Auto-Torque Boost Coefficient
Adjust the value of automatic torque lifting.
Group F7: Start/Stop Control
F7.00
F7.00=0: Direct start
It is applicable to most small-inertia loads,Start frequency is applicable to drive equipment which
requires startup torque, such as cement mixer
1: Rotational speed tracking restart
To catch a spinning motor, the inverter detects speed and direction of spinning motor, and then starts to
run from the spinning motor frequency.
In this start mode, ensure that motor parameters in group F1 are set correctly
2: DC braking restart
The DC injection braking function is applicable to drive load such as elevator and crane
F7.01 Rotational speed tracking mode
To complete the rotational speed tracking process within the shortest time, select the proper mode in
which the inverter tracks the motor rotational speed.
 0: From frequency at stop
It is the commonly selected mode.
 1: From zero frequency
It is applicable to restart after a long time of stop.
 2: From the maximum frequency
It is applicable to the lager mechanical inertia.
F7.02 Rotational speed tracking speed
In the rotational speed tracking restart mode, select the rotational speed tracking speed. The larger the
value is, the faster the tracking is. However, too large value may cause unreliable tracking.
F7.03
F7.04 Startup frequency holding time
Start mode
Startup frequency
0~10.0
0~200
Range:0~2
Range:0~2
Range:1~100
Range:0.00Hz~10.00Hz
Range:0.0s~100.0s
- 102 -
JT550 Series Inverter Manual
4.0
100
Default:0
Default:0
Default:20
Default:0.00Hz
Default:0.0s