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Adjustment of the output torque (current) of the motor
4.3.4
Stall prevention operation (Pr. 22, Pr. 23, Pr. 48, Pr. 66, Pr. 156, Pr. 157)
(1) Block diagram
This function monitors the output current and automatically changes the output frequency to prevent the inverter from
coming to trip due to overcurrent, overvoltage, etc.
It can also limit stall prevention and fast-response current limit operation during acceleration/deceleration, driving or
regeneration.
Stall prevention
If the output current exceeds the stall prevention operation level, the output frequency of the inverter is
automatically changed to reduce the output current.
Fast-response current limit
If the current exceeds the limit value, the output of the inverter is shut off to prevent an overcurrent.
Parameter
Number
Name
Initial Value
Setting Range
Description
22
∗
Stall prevention operation
level
150%
0
Stall prevention operation invalid
0.1 to 200%
Set the current value to start the stall
prevention operation.
23
Stall prevention
operation level
compensation factor
at double speed
9999
0 to 200%
The stall operation level can be reduced
when operating at a high speed above the
rated frequency.
9999
Constant according to
Pr. 22.
48
Second stall prevention
operation current
9999
0
Stall prevention operation invalid
0.1 to 200%
Second stall prevention operation level
9999
Same level as
Pr. 22
.
66
Stall prevention
operation reduction
starting frequency
60Hz
0 to 400Hz
Set the frequency at which the stall
prevention operation level starts being
reduced.
156
Stall prevention operation
selection
0
0 to 31, 100, 101
Select whether stall prevention operation
and fast-response current limit operation
will be performed or not.
157
OL signal output timer
0s
0 to 25s
Output start time of the OL signal output
when stall prevention is activated.
9999
Without the OL signal output
The above parameters can be set when
Pr. 160 Extended function display selection
= "0".
∗
This parameter allows its setting to be changed during operation in any operation mode even if "0 (initial value) or 1" is set in
Pr. 77 Parameter write selection
.
RT = ON
= 0
0
-
+
RT = OFF
Stall prevention operation level
Stall prevention operation invalid
Pr. 48
Pr. 22
Output frequency
Pr. 23
,
Pr. 66
Содержание FR-D710W-0.1K
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Страница 297: ...295 APPENDIX This chapter provides the APPENDIX of this product Always read the instructions before using the equipment ...
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