Справочник Пользователя для Mitsubishi Electronics FR-D740-012

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.

150%

0

Stall prevention operation invalid

0.1 to 200%

Set the current value to start the stall 
prevention operation.

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.

9999

0

Stall prevention operation invalid

0.1 to 200%

Second stall prevention operation level

9999

Same level as Pr. 22.

60Hz

0 to 400Hz

Set the frequency at which the stall 
operation level is started to reduce.

0

0 to 31, 100, 101

Select whether stall prevention operation 
and fast-response current limit operation 
will be performed or not.

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 162)

Stall prevention operation level

Stall prevention operation invalid

RT

= 0

-

+

Output frequency

Pr. 23, Pr. 66

RT

    0