Toshiba TOSVERT VF-AS3 Instruction Manual page 362

6. 30. 2
Prohibited
<F601: Stall prevention level 1>
<F185: Stall prevention level 2>
4
4
6
■ Function
If the current exceeding the level set at Stall prevention level 1 or 2 is flowed, stall prevention
operation will be enabled to lower the output frequencies.
Setting the output frequency low lowers output current of fans and pumps, which prevents
overcurrent trip.
9
■ Parameter setting
Title
F601
F185
*1 Depending on capacity. For details, refer to [11. 6].
In case F601=199, 200(or 159, 160), stall prevention control is not activated.
■ How to set the parameter
100% reference is the inverter rated current.
To switch <F601: Stall prevention level 1> between <F185: Stall prevention level 2>, use signals to
input terminal. Assign "32: Stall prevention switching/Torque limit switching 1" to the unused input
terminal.
For details, refer to [7. 2. 1].
■ Display during the stall prevention operation
If the current exceeding the stall prevention level is about to flow, the output frequency will change.
At this time, the letter "C" will blink.
6. [Advanced] How to use parameters
Setting overcurrent stall
• Do not set the stall prevention level parameters (F601 and F185) extremely low.
If the stall prevention level parameters (F601 and F185) are set at or below the motor no-load
current, the stall preventive function will be always enabled and increase the frequency when it
judges that regenerative braking is taking place.
Do not set the stall prevention level parameters (F601 and F185) at 30% or less under normal
use conditions.
Parameter name
Stall prevention level 1
Stall prevention level 2
CAUTION
F601 : Stall prevention level 1
Min: 10
X1000
Adjustment range
10-200 (HD)
10-160 (ND)
6-120
E6582062
STOP 0.0Hz
13:53
150
%
Max: 200
X100 X10 X1
Unit Default setting
%
*1