336
PARAMETER
(1) Setting of stall prevention operation level
[Pr. 22]
Set in [
Pr. 22
] the percentage of the output current to
the rated inverter current at which stall prevention
operation will be performed. Normally, set 150%
(initial value) for
, and set 120% (initial
value) for
.
During acceleration, stall prevention operation stops
acceleration. During constant speed, it decelerates,
and during deceleration, it stops deceleration. If stall
prevention operated during deceleration to stop, the
inverter would not stop. To prevent this, stall
prevention during deceleration becomes invalid after
3s so that motor decelerates to a stop.
When stall prevention operation is performed, the OL
signal is output.
If an overload status lasts long, an inverter trip (e.g.
electronic thermal O/L relay) (E.THM)) may occur.
When [
Pr. 156
] has been set to activate the fast-
response current limit (initial value), the [
Pr. 22
]
setting should not be higher than 170%. (140% for
) If fast-response current limit activates, torque
may not be generated.
(2) Second, third stall prevention operation
level [Pr. 48, 49**, 114* **, 115* **]
(*Not available for
.)
(**Not available for
.)
In ,
[
Pr. 48 Second stall prevention operation
current
] is valid when [
Pr. 49 Second stall prevention
operation frequency
= 9999] and RT signal is ON. In
, [
Pr. 48
] is valid when RT signals is ON.
When [
Pr. 49 (115)
≠
0] in
, the stall
prevention operation level for output frequency from
0Hz to [
Pr. 49 (115)
] can be set to [
Pr. 48 (114)
]. Note
that the operation level follows the [
Pr. 22
] setting
during acceleration.
This function can also be used for stop-on-contact or
similar operation by decreasing the [
Pr. 48 (114)
]
setting to weaken the deceleration torque (stopping
torque).
[
Pr. 114 and Pr. 115
] of
are valid when the X9
signal is ON. For the terminal used for X9 signal
input, set 9 in any of [
Pr. 178 to Pr. 189 Input terminal
function selection
] to assign the X9 signal function.
Operation example when frequency is set in [
Pr.49
(115)
] in
.
148
Stall prevention level
at 0V input
150%
120%
0 to 220%
0 to 150%
Stall prevention operation level can be changed
by the analog signal input to terminal1 and 4
(For
, input is to terminal 1 only).
{
{
—
—
149
Stall prevention level
at 10V input
200%
150%
0 to 220%
0 to 150%
{
{
—
—
154
Voltage reduction
selection during stall
prevention operation
1
0
With voltage
reduction
You can select whether to
use output voltage
reduction during stall
prevention operation or
not.
{
{
—
—
1
Without voltage
reduction
156
Stall prevention
operation selection
0
0 to 31, 100, 101
You can select whether stall prevention
operation and fast-response current limit
operation will be performed or not.
{
{
{
{
157
OL signal output
timer
0s
0 to 25s
Set the output start time of the OL signal output
when stall prevention is activated.
{
{
{
{
9999
Without the OL signal output
277
Stall prevention
operation current
switchover
0
0
Output current is the limit level
—
—
{
—
1
Output torque (torque current) is the limit level
406
High resolution
analog input
selection
9999
0, 2 to 6, 9999
When the setting value is "4", stall prevention
operation level can be changed by the signal
output to terminal 6.
{
—
—
—
858
Terminal 4 function
assignment
0
0, 1, 4, 9999
By setting 4, the stall prevention operation level
can be changed with a signal to terminal 4.
{
—
—
—
868
Terminal 1 function
assignment
0
0 to 6, 9999
By setting 4, the stall prevention operation level
can be changed with a signal to terminal 1.
{
—
—
—
[Pr. ]
Name
Initial
Value
Setting
Range
Description
Available Inverters
A700
F700
E700
D700
A700
F700
A700
F700
F700
A700
F700
A700
F700
common
A700 E700 D700
F700
F700
Stall prevention operation example
[
Pr. 22
]
OL
Output current
Output frequency
Acceleration
Constant
speed
Deceleration
Time
F700
E700 D700
common
A700 F700
E700 D700
A700 F700
A700
Stall prevention
operation current
During acceleration
Running frequency
[
Pr.48
]
[
Pr.49
]
During deceleration/constant speed
During deceleration/constant speed
During deceleration/constant speed
[
Pr.114
]
[
Pr.115
]
[
Pr. 22
]
used
Output
frequency (Hz)
Output
frequency
Stall
prevention
level
Set
frequency
Time
[
Pr.49
(Pr.115)
]
[
Pr. 48
(Pr.114)
]
used
A700
Summary of Contents for FR-A700 Series
Page 245: ...279 2 PARAMETER PARAMETER MEMO ...
Page 440: ...474 PARAMETER MEMO ...
Page 522: ...556 SELECTION MEMO ...
