Stall Prevention Operation And Regeneration Avoidance Operation - Mitsubishi Electric FR-A700 Technical Manual

2.14 Stall prevention operation and regeneration
avoidance operation
2.14.1 Overcurrent stall prevention operation [Pr. 22, 23, 48, 49
*
154 , 156, 157, 277
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.
It is invalid under Real sensorless vector control and vector
control by . (It serve as torque limit and not as stall
A700
prevention operation (current limit). Refer to page 283)
[Pr. ] Name
Stall prevention
22
operation level
Stall prevention
operation level
23
compensation factor
at double speed
Second stall
48 prevention operation
current
Second stall
49 prevention operation
frequency
Stall prevention
66 operation reduction
starting frequency
Third stall prevention
114
operation current
Third stall prevention
115
operation frequency
* * * common
, 858 , 868 ]
(common)
(*[Pr. 49, 114, 115, 148, 149, 154, 858, 868] are not available for
Initial Setting
Value Range
Stall prevention operation selection becomes
0
invalid.
A700 E700
A700
0.1 to 400%
D700
Set the current value at which stall prevention
150%
F700
operation will be started.
0.1 to 150%
F700
120%
E700 D700
0.1 to 200%
9999 Analog variable
The stall operation level can be reduced when
0 to 200% operating at a high speed above the rated
9999
frequency.
9999 Constant according to [Pr. 22]
0 Second stall prevention operation invalid
A700
A700 E700
0.1 to 220%
D700
The second stall prevention operation level can
F700
150%
be set.
0.1 to 150%
F700
E700 D700
120%
0.1 to 200%
9999 Same level with [Pr. 22]
0 Second stall prevention operation invalid
Set the frequency at which stall prevention
0Hz 0.01 to 400Hz
operation of [Pr. 48] is started.
9999 [Pr. 48] is valid when the RT signal is ON.
Set the frequency at which the stall operation
60Hz 0 to 400Hz
level is started to reduce.
0 Third stall prevention operation invalid
150%
The stall prevention operation level can be
0.1 to 220%
changed with the X9 signal.
0 Third stall prevention operation invalid
0Hz
Set the frequency at which stall prevention
0.01 to 400Hz
operation starts when the X9 signal is ON.
* , 66, 114
(*[Pr. 114, 115, 858, 868] are not available for
(*[Pr. 277] is available for only
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 .
Also the second stall prevention function can restrict the
output frequency range in which the stall prevention
function is valid.
In , output current and output torque can be
E700
chosen and limited.
Fast-response current limit
If the current exceeds the limit value, the output of the
inverter is shut off to prevent an overcurrent.
Description
335
PARAMETER
* , 115 * , 148 * , 149 * ,
.)
F700
.)
E700 D700
.)
E700
Available Inverters
A700
F700 E700 D700
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