Yaskawa Z1000U User Manual download pdf (Page 169)

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 4

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 4.37 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

ref

× (L8-19)

ref

× (L8-19)

ref

× (L8-19)

ref

× (L8-19)

ref

Output frequency

Reset oH

Alarm

Reset oH

Alarm

Digital output (4D)

Alarm

oH alarm number

Figure 4.37 Output Frequency Reduction During Overheat Alarm

L8-06: Input Phase Loss Detection Level

Sets the Input Phase Loss Detection (PF) Level.

Triggers PF fault when there is an imbalance larger than the value set to L8-06 in the drive input power voltage.

Detection Level = 100% = Voltage Class ×

No. Name Setting Range Default

L8-06 Input Phase Loss Detection Level 0.0 to 25.0%

Determined by

o2-04

4.12 Advanced Drive Setup Adjustments

YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual

169

Start-Up Programming

& Operation

1 2 ... 164 165 166 167 168 169 170 171 172 173 174 ... 377 378

Comments to this Manuals

No comments

Yaskawa Z1000U User Manual Page 169

Comments to this Manuals

Related products and manuals for Equipment Yaskawa Z1000U