Yaskawa VS-616G5 Series Revision F Programming Manual - Manual (Page 110)

110 VS-616G5 Programming Manual
Section L: Protection Parameters
L3 Stall Prevention / Current Limit
Sets a function to prevent stalling during an overload condition while running at constant speed.
Setting Range: 30 to 200%
Factory Default: 160%
The stall prevention/current limit level during running is set as a percentage of inverter rated current. A
setting of 200% disables current limit during running. During speed agree, if the output current
exceeds this current limit level during running, then deceleration starts.
When the output current exceeds this current limit level (L3-06), deceleration continues. When the
output current decreases below this current limit level (L3-06), acceleration starts, up to the set fre-
quency.
L3-05 Stall Prevention Selection During Running StallP Run Sel B B − −
Setting Description
0 Stall prevention/current limit during running is disabled. An excessively short deceler-
ation time will generate an overvoltage fault (OV), and the inverter will stop.
1 Stall prevention/current limit during running is enabled (factory default).
When the inverter output current exceeds the current limit level (L3-06) for more than
100ms during speed agree, the output frequency is decreased according to deceler-
ation time 1 (C1-02), and this can prevent stalling. When the load condition is stabi-
lized, the inverter accelerates to the previous frequency.
2 Stall prevention/current limit during running is enabled as in setting “1”, however the
output frequency is decreased according to deceleration time 2 (C1-04).
L3-06 Stall Prevention Level During Running StallP Run Lvl B B − −
Motor Current
n072
Time
Output Frequency
Time
*
* Decreases frequency to prevent
the inverter from tripping.
Figure 54 Stall Prevention/Current Limit During Running