YASKAWA OYMC V1000, Programming Manual

Page: 203 / 408

1.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual 203
Pa
ra
m
et
er D
et
ai
ls
1
■
L3-05: Stall Prevention Selection during Run
Stall Prevention during Run can prevent a motor from stalling by automatically reducing the
speed when a transient overload occurs while the motor is running at constant speed.
This parameter selects the Stall Prevention during Run method.
Note: 1. This function is not available in Open Loop Vector Control. Use the torque limit function instead.
2. When output frequency is 6 Hz or less, Stall Prevention during Run is disabled regardless of the setting
in L3-05/06.
Setting 0: Disabled
Drive runs at the set frequency reference. A heavy load may cause the motor to stall and trip
the drive with an OC or OL fault.
Setting 1: Decelerate Using C1-02
If the current exceeds the Stall Prevention level set in parameter L3-06, the drive decelerates
at Decel Time 1 (C1-02). Once the current level drops below the value of L3-06 minus 2%
for 100 ms it accelerates back to the frequency reference at the active acceleration time.
Setting 2: Decelerate Using C1-04
Same as setting 1 except the drive decelerates at decel time 2 (C1-04).
■
L3-06: Stall Prevention Level during Run
Sets the current level for Stall Prevention during run. Depending on the setting of parameter
L3-23 the level is automatically reduced in the constant power range (speed beyond base
speed).
■
L3-23: Automatic Stall Prevention Level Reduction
This function reduces the Stall Prevention during run level in the constant power range.
No. Name Setting Range Default
L3-05 Stall Prevention Selection during Run 0 to 2 1
No.
<1> The upper limit and default for this setting is determined by C6-01 and L8-38.
Name Setting Range Default
L3-06 Stall Prevention Level during Run 30 to 150
<1> <1>
No. Name Setting Range Default
L3-23
Automatic Reduction Function Selection for Stall
Prevention during Run
0 or 1 0