
Pr. 22, 23, 48, 49, 66, 148, 149, 154, 156, 157
Stall prevention operation
Pr.22 Stall prevention operation level
Pr.23 Stall prevention operation level compensation factor at double speed
Pr.48 Second stall prevention operation current | Pr.49 Second stall prevention operation frequency |
Pr.66 Stall prevention operation reduction starting frequency | |
Pr.148 Stall prevention level at 0V input. | Pr.149 Stall prevention level at 10V input. |
Pr.154 Voltage reduction selection during stall prevention operation | |
Pr.156 Stall prevention operation selection | Pr.157 OL signal output timer |
This function monitors the output current and automatically changes the output frequency to prevent the inverter from coming to an alarm stop due to overcurrent, overvoltage, etc. It can also limit stall prevention and
Stall prevention |
If the output current exceeds the limit value, 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. |
(Pr.49) |
|
If the current exceeds the limit value, the output of the inverter is |
shut off to prevent an overcurrent. |
Set in Pr. 22 the ratio of the output current to the rated inverter |
current at which stall prevention operation will be performed. |
Normally set this parameter to120% (initial value). |
When “9999” is set in Pr. 22, stall prevention operation level can be |
changed by the signal to the auxiliary input terminal (terminal 1). For |
the adjustment of bias/gain of analog signal, use Pr. 148 and Pr. 149. |
During |
acceleration may not be made because the motor current does |
not increase. If operation is performed in a high frequency range, |
the current at motor lockup becomes smaller than the rated output |
current of the inverter, and the protective function (OL) is not |
Pr. 49 Setting | Operation | |
0 (initial value) | Second stall prevention function is not activated | |
0.01Hz to 400Hz | If the output frequency is less than the frequency set in | |
Pr. 49, the second stall prevention operation function is | ||
| activated. (during constant speed or deceleration) | |
| The second stall prevention function is performed according to | |
9999 | the RT signal. | |
RT signal on ....... Stall level Pr. 48 | ||
| ||
| RT signal off ....... Stall level Pr. 22 |
Stall prevention operation and fast response current restriction function can be restricted according to the operation condition using Pr. 156.
Pr. 24 to 27 |
|
| Refer to the section about Pr.4 to Pr.6 | |
|
| |||
Pr. | 28 | Input compensation of multi- | ||
speed and remote setting |
Pr.28
By inputting the frequency setting compensation signal (terminal 1, 2), the speed (frequency) can be compensated for relative to the
Pr. 28 Setting | Definition |
0 (initial value) | Without compensation |
1 | With compensation |
Acceleration/ deceleration pattern | |
Pr. 29, 140 to 143 and back lash measures | |
Pr.29 Acceleration/deceleration pattern selection | Pr.140 Backlash acceleration stopping frequency |
Pr.141 Backlash acceleration stopping time | Pr.142 Backlash deceleration stopping frequency |
Pr.143 Backlash deceleration stopping time |
|
You can set the acceleration/deceleration pattern suitable for application.
You can also set the backlash measures that stop acceleration/ deceleration once at the
|
| Features |
|
| |
|
|
| |||
|
|
| |||
Peripheral Devices | Why energy | savings? | |||
|
|
|
|
|
|
| Standard | Specifications |
| ||
|
|
|
|
|
|
Outline | Dimension | Drawings | |||
|
|
|
|
|
|
|
|
|
|
|
|
Terminal Connection | Diagram | Terminal Specification | Explanation | ||
|
|
|
|
|
|
| Operation | Panel |
| ||
|
|
|
|
|
|
|
|
|
|
|
|
| Parameter | List |
| ||
|
|
|
|
|
|
|
|
|
|
|
|
Explanations | of | Parameters |
executed if the motor is at a stop. |
To improve the operating characteristics of the motor in this case, |
the stall prevention level can be reduced in the high frequency |
region. This function is effective for performing operation up to the |
high speed region on a centrifugal separator etc. Normally, set |
60Hz in Pr. 66 and 100% in Pr. 23. |
By setting "9999" (initial value) in Pr. 23 Stall prevention operation |
level compensation factor at double speed, the stall prevention |
operation level is constant at the Pr. 22 setting up to 400Hz. |
Pr.22 |
|
| Reduction ratio compensation |
|
|
| When Pr.23=9999 |
| |
Stall prevention operation level (%) |
| Pr.23 | factor (%) | |
| 400Hz | |||
| Pr.66 |
|
| |
|
|
|
|
Output frequency (Hz)
Setting "9999" in Pr. 49 Second stall prevention operation frequency and turning the RT signal on make Pr. 48 Second stall prevention operation current valid.
The stall prevention operation level from 0Hz to the output frequency set in Pr. 49 can be set in Pr. 48.
Set frequency | exceeds Pr. 49 | Set frequency is | Pr. 49 or less |
Output |
|
| Output |
|
|
| frequency (Hz) |
| |
frequency (Hz) | Output |
| ||
|
| |||
Set |
| frequency |
| Output |
|
|
| ||
|
|
| frequency | |
frequency |
|
| Pr.49 | |
|
|
| ||
Pr.49 |
|
|
| |
|
| Set |
| |
|
|
|
| |
|
|
| frequency |
|
Stall |
| Time |
| Time |
|
|
| ||
prevention |
|
|
|
|
level | Pr. 22 |
|
|
|
| used | Pr. 48 | Pr. 22 | Pr. 48 |
|
| used | used | |
|
| used | ||
|
|
|
|
Setting value "0"
Outputfrequency | [Linear acceleration |
/ deceleration] | |
(Hz) | |
| Time |
Setting value "1"
frequency | |
/deceleration A] | |
| |
Output | fb |
(Hz) | |
| Time |
Setting value "2"
|
| |
|
| /deceleration B] |
Set frequency | (Hz) |
|
frequency | f1 |
|
|
| |
Output | f2 |
|
(Hz) | Time | |
|
|
(Hz) |
| Setting value "3" |
|
frequency | function] |
| |
|
| ||
|
|
| f2 |
Output |
|
| Pr.142 |
| f1 |
| |
|
|
| |
|
| Pr.140 |
|
| t1 | t2 | Time |
|
| ||
| Pr.141 | Pr.143 |
|
Linear acceleration/deceleration (setting "0", initial value)
⋅When the frequency is changed for acceleration, deceleration, etc. in inverter operation, the output frequency is changed linearly (linear acceleration/deceleration) to reach the set frequency without straining the motor and inverter.
⋅For machine tool spindle applications, etc.
Use when acceleration/deceleration must be made in a short time to a
⋅For prevention of load shifting in conveyor and other applications Since acceleration/deceleration is always made in an S shape from current frequency (f2) to target frequency (f1), this function eases shock produced at acceleration/ deceleration and is effective for load collapse prevention, etc.
Backlash measures (setting "3", Pr.140 to Pr.143 )
⋅To avoid backlash, acceleration/ deceleration is temporarily stopped. Set the acceleration/deceleration stopping frequency and time in Pr. 140 to Pr. 143.
Protective | Functions |
|
|
|
|
Options | |
|
|
|
|
Instructions | |
|
|
|
|
Motor | |
|
|
|
|
Compatibility | |
|
|
Warranty | |
|
|
|
|
Inquiry | |
|
|
Pr. indicates simple mode parameters and Pr. indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions. | 30 |