Mitsubishi Electric FR-F700PJ Series, Инструкция по эксплуатации

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96
Adjustment of the output torque (current) of the motor
4.4.4 Stall prevention operation (Pr. 22, Pr. 23, Pr. 48, Pr. 66, Pr. 154, 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
120%

0 Stall prevention operation invalid
0.1 to 150%
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 150% 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
operation level starts being reduced.
154
Voltage reduction selection
during stall prevention
operation
1
1
Does not suppress the overvoltage
protective function
11
Suppresses the overvoltage protective
function
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". ( Refer to page 197 )

Performing IPM parameter initialization changes the settings. ( Refer to page 85 )
.... Specifications differ according to the date assembled. Refer to page 346 to check the SERIAL number.
V/F V/F V/F
GP
MFVC
GP
MFVC
GP
MFVC
V/F V/F V/F
GP
MFVC
GP
MFVC
GP
MFVC
V/F V/F V/F
GP
MFVC
GP
MFVC
GP
MFVC
Stall prevention operation level
Stall prevention operation invalid
Pr. 48
Pr. 22
Output frequency
Pr. 23 , Pr. 66
0
-
+
RT=OFF
RT=ON
=0