Brake Timing With Maximum Load - Toshiba TOSVERT VF-S15 Instruction Manual

4.4.3 Brake timing with maximum load

Confirm if there is any problem with brake timing with maximum load after completion of adjustment of
brake timing at no-load (light load).
Please confirm the following items;
- Whether or not brake is released smoothly without load gap (shifts) at winding up or starting
- With our without load gap (shifts) when the brake operates?
- With or without load gap (shifts) when repeating start (run/stop)?
- With or without unusual noise from the brake at the time of start and stop.
- With or without the inverter trip at the time of start or stop.
If there is no trouble after confirmation, an adjustment of the brake function is completed.
《Useful function for adjustment》
Timing adjustment to release brake at the same time with gaining enough torque and stop after the brake
is completely closed are required for lift application.
Therefore, the motor is restrained to some degree at start/stop.
Short restrained time may cause load gap (shifts). But, long restrained time increases motor current,
which will cause the inverter trip.
Please use the following parameters for adjustment to confirm a peak output current.
Usually, a peak output current is about 150% of inverter's rated current.
Function
Title
f709
Standard monitor hold function
f710
Initial panel display selection
f750 EASY key function selection
The status monitor display shows "Peak hold value of output current" by the above parameter settings.
Display changes as the peak value of the output current changes by repeating start/stop.
This value is forcibly reset by pushing the "EASY" key.
Setting range
0:Real time
1:Peak hold
2:Minimum hold
0 - 52
0:Easy/standard setting mode
switching function
1:Shortcut key
2:Local/remote key
3:Monitor peak /minimum hold trigger
4: -
5: -
２３
Default
Setting
setting
sample
value
0 1
0 1 Output current
0 3
E6581871
Notes
-
-