Mitsubishi Electric FR-D720S SC EC, Инструкция по эксплуатации

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Parameter Adjust the output torque (current) of the motor
FR-D700 SC EC 6 - 33
6.2.4 Stall prevention operation (Pr. 22, Pr. 23, Pr. 48, Pr. 66, Pr. 156, Pr. 157)
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/de-
celeration, driving or regeneration.
●
Stall prevention
If the output current exceeds the stall prevention operation level, the output frequency of the
inverter is automatically varied 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.
The above parameters can be set when Pr. 160 = 0.
The above parameter allows its setting to be changed during operation even if "0" (initial
value) is set in Pr. 77 "Parameter write selection".
Pr.
No.
Name
Initial
Value
Setting
Range
Description Parameters referred to
Refer to
Section
22
Stall prevention operation
level
150%
0 Stall prevention operation invalid
3
178–182
190/
192/197
Base frequency
Input terminal
function selection
Output terminal
function selection 6.4.1
6.9.1
6.9.5
0.1–200%
Set the current value to start the
stall prevention operation.
23
Stall prevention operation
level compensation factor at
double speed
9999
0–200%
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 oper-
ation current
9999
0 Stall prevention operation invalid
0–200%
Second stall prevention operation
level
9999 Same level as Pr. 22.
66
Stall prevention operation
reduction starting frequency
50Hz 0–400Hz
Set the frequency at which the
stall operation level is started to
reduce.
156
Stall prevention operation
selection
0
0–31/
100/101
Select whether stall prevention
operation and fast-response cur-
rent limit operation will be per-
formed or not.
157
OL signal output timer 0s
0–25s
Output start time of the OL signal
output when stall prevention is
activated.
9999 Without the OL signal output