Protection Functions - Toshiba Tosvert VF-S15 Instruction Manual

6.29 Protection functions

6.29.1 Setting motor electronic thermal protection
thr : Motor electronic-thermal protection level 1
173 : Motor electronic-thermal protection level 2
f607 : Motor 150% overload detection time
f632 : Electronic-thermal memory
Refer to section 5.6.
6.29.2 Setting of stall prevention level
f601 : Stall prevention level 1
f185 : Stall prevention level 2
 Do not set the stall prevention level (f601) extremely low.
If the stall prevention level parameter (f601) is set at or below the no-load current of the motor, the
stall preventive function will be always active and increase the frequency when it judges that
Prohibited
regenerative braking is taking place.
Do not set the stall prevention level parameter (f601) below 30% under normal use conditions.
 Function
This parameter adjusts the output frequency by activating a current stall prevention function against a
current exceeding the -specified level.
[Parameter setting]
Title
Stall prevention level 1
f601
f185 Stall prevention level 2
[Display during operation of the stall prevention]
During an oc alarm status, (that is , when there is a current flow in excess of the stall prevention level),
the output frequency changes. At the same time, to the left of this value, "c" is displayed flashing on
and off.
Example of display
c
The switching from f601 to f185 can be performed by entering a command through terminals.
Refer to section 6.8.1 for details.
Note: The 100% standard value is the rated output current indicated on the nameplate.
Caution
Function
50
F-99
Adjustment range
10-199 (%) / (A),
200: Disabled
E6581926
6
Default setting
150