Yaskawa Matrix Converter - Manual (Page 145)

Parameter Tables
5-
45
„ L3: Stall Prevention
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control
Methods MEMO-
BUS
Register
Page
Display V/f
Open
Loop
Vector
Flux
Vector
L3-01 *
Stall Prevention
Selection During
Accel Selects the stall prevention method used
to prevent excessive current during accel-
eration.
0: Disabled. - Motor accelerates at
active acceleration rate. The motor
may stall if load is too heavy or accel
time is too short.
1: General Purpose - When output cur-
rent exceeds L3-02 level, acceleration
stops. Acceleration will continue
when the output current level falls
below the L3-02 level.
2: Intelligent - The active acceleration
rate is ignored. Acceleration is com-
pleted in the shortest amount of time
without exceeding the current value
set in L3-02.
0 to 2 1 No A A No 48FH
4-17
6-21
StallP Accel Sel
L3-02
Stall Prevention
Level During
Acceleration This function is enabled when L3-01 is
“1” or “2”.
MxC rated current is 100%. Decrease the
set value if stalling or excessive current
occurs with default.
0 to 200 150% No A A No 490H
4-17
6-21
StallP Accel Lvl
L3-03
Stall Prevention
Limit During
Acceleration Sets the lower limit for stall prevention
during acceleration, as a percentage of
the rated current of the MxC, when oper-
ation is in the frequency range above E1-
06 (constant power region).
0 to 100 50% No A A No 491H
4-17
6-21
StallP CHP Lvl
L3-04 *
Stall Prevention
Selection During
Deceleration 0: Disabled. - Motor decelerates at
active deceleration rate. The motor
may stall if load is too heavy or decel
time is too short.
1: General Purpose - When output cur-
rent exceeds L3-14 level, deceleration
stops. Deceleration will continue
when the output current level falls
below the L3-14 level.
0 or 1 1 No A A A 492H 6-23
StallP Decel Sel
L3-05
Stall Prevention
Selection During
Run Selects the stall prevention method to use
to prevent MxC faults during run.
0: Disabled.- MxC runs a set frequency.
A heavy load may cause the MxC to
trip on an OC or OL fault.
1: Decel Time 1 - In order to avoid stall-
ing during heavy loading, the MxC
will 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
MxC will accelerate back to its fre-
quency reference at the active acceler-
ation rate.
2: Decel Time 2 - Same as setting 1
except the MxC decelerates at Decel
Time 2 (C1-04).
When output frequency is 6 Hz or
less, Stall Prevention during Run is
disabled regardless of the setting in
L3-05.
0 to 2 1 No A No No 493H
4-17
6-43
StallP Run Sel