335
PARAMETER
2
P
ARAM
ETE
R
2.14 Stall prevention operation and regeneration
avoidance operation
2.14.1 Overcurrent stall prevention operation [Pr. 22, 23, 48, 49
*
, 66, 114
*
, 115
*
, 148
*
, 149
*
,
154
*
, 156, 157, 277
*
, 858
*
, 868
*
]
(common)
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
prevention operation (current limit). Refer to page 283)
z
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
chosen and limited.
z
Fast-response current limit
If the current exceeds the limit value, the output of the
inverter is shut off to prevent an overcurrent.
(*[Pr. 114, 115, 858, 868] are not available for
.)
(*[Pr. 49, 114, 115, 148, 149, 154, 858, 868] are not available for
.)
(*[Pr. 277] is available for only
.)
common
F700
E700
D700
E700
A700
E700
[Pr. ]
Name
Initial
Value
Setting
Range
Description
Available Inverters
22
Stall prevention
operation level
150%
120%
0
Stall prevention operation selection becomes
invalid.
{
{
{
{
0.1 to 400%
0.1 to 150%
0.1 to 200%
Set the current value at which stall prevention
operation will be started.
{
{
{
{
9999
Analog variable
—
{
—
—
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
150%
120%
0
Second stall prevention operation invalid
{
{
{
{
0.1 to 220%
0.1 to 150%
0.1 to 200%
The second stall prevention operation level can
be set.
9999
Same level with [
Pr. 22
]
—
—
{
{
49
Second stall
prevention operation
frequency
0Hz
0
Second stall prevention operation invalid
{
{
—
—
0.01 to 400Hz
Set the frequency at which stall prevention
operation of [
Pr. 48
] is started.
9999
[
Pr. 48
] is valid when the RT signal is ON.
66
Stall prevention
operation reduction
starting frequency
60Hz
0 to 400Hz
Set the frequency at which the stall operation
level is started to reduce.
{
{
{
{
114
Third stall prevention
operation current
150%
0
Third stall prevention operation invalid
{
—
—
—
0.1 to 220%
The stall prevention operation level can be
changed with the X9 signal.
115
Third stall prevention
operation frequency
0Hz
0
Third stall prevention operation invalid
{
—
—
—
0.01 to 400Hz
Set the frequency at which stall prevention
operation starts when the X9 signal is ON.
A700
F700
E700
D700
A700 E700
D700
F700
A700
F700
E700 D700
A700 E700
D700
F700
A700
F700
E700 D700
Summary of Contents for FR-A700 Series
Page 245: ...279 2 PARAMETER PARAMETER MEMO ...
Page 440: ...474 PARAMETER MEMO ...
Page 522: ...556 SELECTION MEMO ...