YASKAWA E7U Programming Manual page 160

Parameter
Parameter Name
No.
Digital Operator Display
Stall Prevention Selection During
L3-01 Accel
StallP Accel Sel
Stall Prevention Level During
L3-02 Accel
StallP Accel Lvl
Stall Prevention Selection During
L3-04 Decel
StallP Decel Sel
Stall Prevention Level During
L3-05 Decel
StallP Run Sel
Stall Prevention Level During
L3-06 Running
StallP Run Level
Table A.1
Parameter List (Continued
Description
Stall Prevention
0: Disabled (Motor accelerates at active acceleration,
C1-01 or C1-03. The motor may stall if load is too
heavy or accel time is too short.)
1: General Purpose (When output current exceeds L3-
02 level, acceleration stops. It starts to accelerate at
current value recovery.)
2: Intelligent (The active acceleration rate, C1-01 or C1-
02, is ignored. Acceleration is completed in the
shortest amount of time w/o exceeding the current
value set in L3-02.
This function is enabled when L3-01 is "1" or "2".
Drive rated current is 100%. Decrease the set value if
stalling occurs at factory setting.
0: Disabled (The Drive decelerates at the active
deceleration rate, C1-02 or C1-04. If the load is too
large or the deceleration time is too short, an OV fault
may occur.)
1: General Purpose (The Drive decelerates at the active
deceleration rate, C1-02 or C1-04, but if the main
circuit DC bus voltage reaches the stall prevention
level the output frequency will clamp. Deceleration
will continue once the DC bus level drops below the
stall prevention level.)
2: Intelligent (The active deceleration rate is ignored
and the Drive decelerates as fast as possible w/o
hitting OV fault level.)
0: Disabled (Drive runs a set frequency.) A heavy load
may cause the Drive to trip on an OC fault.
1: Decel Time 1 (In order to avoid stalling during heavy
loading, the Drive will start to decelerate at Decel
time 1 (C1-02) if the output current exceeds the level
set by L3-06. Once the current level drops below the
L3-06 level the Drive will accelerate back to its set
frequency at the active acceleration rate.)
2: Decel Time 2 (Same as setting 1 except the Drive
decelerates at Decel Time 2 (C1-04).)
For 6Hz or less frequency, stall prevention function
during run is disabled regardless of L3-05 set.
This function is enabled when L3-05 is "1" or "2".
Drive rated current is set as 100%.
Normally, changing the setting is not required.
Decrease the set value if stalling occurs at factory
setting.
Parameters A - 20
)
Setting Factory
Range Setting
0 to 2 1
0 to 200 120%
0 to 3 1
0 to 2 1
30 to 200 120%
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