Mitsubishi Electric 800 Series, Инструкция по эксплуатации, Страница: 333 / 727

(H) Protective function parameter
332
PARAMETERS
5.10.10
Stall prevention operation

The upper limit of stall prevention operation is limited internally to the following.
120% (SLD rating), 150% (LD rating), 220% (ND rating), or 280% (HD rating)
This function monitors the output current and automatically changes the output frequency to prevent the inverter from
tripping due to overcurrent, overvoltage, etc. It can also limit the stall prevention and fast-response current limit
operation during acceleration/deceleration and power/regenerative driving.
This function is disabled during Real sensorless vector control, vector control and PM sensorless vector control.
• 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.
Also the second stall prevention function can limit the output frequency range in which the stall prevention function is
enabled.
• Fast-response current limit
If the current exceeds the limit value, the output of the inverter is shut off to prevent an overcurrent.
Pr. Name
Initial
value Setting
range
Description
22
H500 Stall prevention operation
level
150%
0 Stall prevention operation disabled.
0.1 to 400%

Set the current limit at which the stall prevention operation will
start.
156
H501 Stall prevention operation
selection
0
0 to 31,
100 to 101 Enable/disable the stall prevention operation and the
fast-response current limit operation.
48
H600 Second stall prevention
operation level
150%
0 Second stall prevention operation disabled.
0.1 to 400%

The stall prevention operation level can be changed using the RT
signal.
49
H601 Second stall prevention
operation frequency
0 Hz
0 Second stall prevention operation disabled.
0.01 to 590 Hz
Set the frequency at which the Pr.48 stall prevention operation will
start.
9999 Pr.48 is enabled when RT signal is ON.
114
H602 Third stall prevention
operation level
150%
0 Third stall prevention operation disabled.
0.1 to 400%

The stall prevention operation level can be changed using the X9
signal.
115
H603 Third stall prevention
operation frequency
0 Hz
0 Third stall prevention operation disabled.
0.01 to 590 Hz
Set the frequency at which the stall prevention operation will start
when the X9 signal turns ON.
23
H610
Stall prevention operation
level compensation
factor at double speed
9999
0 to 200%
The stall operation level when running at high speeds above the
rated frequency can be reduced.
9999 Stall prevention operation disabled at double speed.
66
H611
Stall prevention operation
reduction starting
frequency
60 Hz 0 to 590 Hz
Set the frequency at which the stall operation level reduction will
start.
148
H620 Stall prevention level at 0
V input
150% 0 to 400%

The stall prevention operation level can be changed by the analog
signal input to the terminal 1 (terminal 4).
149
H621 Stall prevention level at
10 V input
200% 0 to 400%

154
H631
Voltage reduction
selection during stall
prevention operation
1
0
Output voltage reduction
enabled.
Enable/disable the output voltage
reduction during stall prevention
operation.
1
Output voltage reduction
disabled.
10
Output voltage reduction
enabled.
Use this setting when the overvoltage
protective function (E.OV[ ]) activates
during stall prevention operation in an
application with large load inertia.
11
Output voltage reduction
disabled.
157
M430
OL signal output timer
0 s
0 to 25 s
Set the OL signal output start time when stall prevention is
activated.
9999 No OL signal output.
858
T040 Terminal 4 function
assignment
0 0, 1, 4, 9999
When set "4", the stall prevention level can be changed with the
signal to the terminal 4.
868
T010 Terminal 1 function
assignment
0 0 to 6, 9999
When set "4", the stall prevention level can be changed with the
signal to the terminal 1.
V/F V/F V/F Magnetic flux Magnetic flux Magnetic flux