Yaskawa CIMR-PU2A0081 — управление температурными сигналами в приводах: предостережения и действия [246/548]

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Yaskawa CIMR-PU2A0010 [246/548] L8 03 overheat pre alarm operation selection
The drive outputs an alarm when the heatsink temperature exceeds the overheat alarm level. If the drive is set to continue
operation after this alarm occurs (L8-03 = 4)
and the temperature reaches the overheat fault level, the drive will trigger an oH1
fault and stop operation.
When an output terminal is set for the oH pre-alarm (H2-oo = 20), the switch will close when the heatsink temperature rises
above L8-02.
No. Name Setting Range Default
L8-02 Overheat Alarm Level 50 to 150 °C
Determined by
o2-04
n
L8-03: Overheat Pre-Alarm Operation Selection
Sets the operation when an overheat pre-alarm is detected.
Note: Change L8-03 setting only when necessary.
No. Name Setting Range Default
L8-03 Overheat Pre-Alarm Operation Selection 0 to 4 3
Setting 0: Ramp to stop
If an overheat alarm occurs, the drive decelerates to stop using the currently selected deceleration time. If a digital output is
programmed for “fault” (H2-oo = E), this output will be triggered.
Setting 1: Coast to stop
If an overheat alarm occurs, the drive switches off the output and the motor coasts to stop. If a digital output is programmed
for “fault” (H2-oo = E), this output will be triggered.
Setting 2: Fast Stop
If an overheat alarm occurs, the drive decelerates to stop using the Fast Stop time (C1-09). If a digital output is programmed
for “fault” (H2-oo = E), this output will be triggered.
Setting 3: Alarm only
If an overheat alarm occurs, an alarm is output and the drive continues operation.
Setting 4: Operation with reduced speed
If
an
overheat
alarm
occurs,
the
operation
continues
with the speed reduced to the level set to parameter L8-19. If the oH alarm
is still present after 10 s, the speed is reduced again. The amount of speed reduction depends on how often the alarm repeats.
If the oH alarm disappears while the drive is operating at a reduced speed, the drive will switch to the previous speed in 10 s
increments until reaching base frequency. Figure 5.81 explains the operation with reduced speed during an oH alarm. A digital
output programmed for 4D is switched when the oH alarm is still active after ten reduction cycles.
10 s
etc.
time
10 s 10 s 10 s 10 s 10 s 10 s
f
ref
× (L8-19)
f
ref
× (L8-19)
2
f
ref
× (L8-19)
4
f
ref
× (L8-19)
3
f
ref
Output frequency
Reset oH
Alarm
Reset oH
Alarm
Digital ouput (4D)
oH
Alarm
oH
Alarm
oH
Alarm
oH
Alarm
oH alarm number
Figure 5.81 Output Frequency Reduction During Overheat Alarm
5.8 L: Protection Functions
246
YASKAWA SIEP YAIP1U 01A AC Drive - P1000 Technical Manual

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Изучите, как привод реагирует на перегрев, включая уровни сигналов тревоги и действия при их возникновении. Узнайте о настройках и режимах работы при перегреве.