Abnormal Phenomenon And The Measures - Toshiba TOSVERT VF-S15 Instruction Manual

4.4.4 Abnormal phenomenon and the measures

Abnormal phenomenon and the measures (adjustment item) according to load and operating condition
Load Operating
condition condition
No-load At start
No-load or
At start
load
No-load or At start or
load stop
At
No-load or switching
load forward/
reverse
《Notice of adjustment》
When adjusting f345 (Brake release time) and f347 (Creeping time 2), change
the value little by little.
A large value of change causes large time lag between when the brake is released and
when the enough torque is produced, which may result in fall of the load.
Abnormal phenomenon
Wind down after winding up a little
when the winding down command is
issued.
The load falls slightly (load gap/shift)
when winding up.
The load falls slightly (load gap/shift)
by repeating start/stop (inching)
frequently at winding up.
Brake is not active when switching
forward/ reverse.
２４
Countermeasure (adjustment item)
1) Set f345 (Brake release time) to
short.
2) Lower the value of f344
(Lowering torque bias multiplier) by
5%.
3) Lower the value of f343
(Hoisting torque bias input) by 5 to
10%.
1) Increase the torque bias value of
f342 (Load portion torque input
selection) and f343 (Hoisting
torque bias input) by 10 to 20%.
1) Set f345 (Brake release time) to
short.
1) Lower the value of f462(Speed
reference filter coefficient) by 5
E6581871