LSIS G100, Operation Manual

Page: 194 / 343

Code and
Features
Description
Pr.50 Stall
Prevent
Stall prevention can be configured for acceleration, deceleration, or
while operating a motor at constant speed. When the top LCD
segment is on, the corresponding bit is set. When the bottom LCD
segment is on, the corresponding bit is off.
Items Bit On Status Bit Off Status
Keypad
Configuration
Function
bit4 bit3 bit2 bit1

Stall protection during
acceleration

Stall protection while operating
at a constant speed

Stall protection during
deceleration

Flux braking during
deceleration
Configuration Function
0001
Stall
protectiond
uring
acceleratio
n
If inverter output current exceeds the preset
stall level (Pr. 52, 54, 56, 58) during
acceleration, the motor stops accelerating
and starts decelerating. If current level stays
above the stall level, the motor decelerates
to the start frequency (dr.19). If the current
level causes deceleration below the preset
level while operating the stall protection
function, the motor resumes acceleration.
0010
Stall
protection
while
operating
at constant
speed
Similar to stall protection function during
acceleration, the output frequency
automatically decelerates when the current
level exceeds the preset stall level while
operating at constant speed. When the load
current decelerates below the preset level, it
resumes acceleration. During acceleration,
the operation will follow the stall protection
settings for acceleration.
0100
Stall
protection
during
deceleratio
n
The inverter decelerates and keeps the DC
link voltage below a certain level to prevent
an over voltage fault trip during deceleration.
As a result, deceleration times can be longer
than the set time depending on the load.