1.8 L: Protection Functions
218 YASKAWA ELECTRIC SIEP C710606 10A YASKAWA AC Drive - V1000 PRELIM. Programming Manual
Setting 0: Ramp to Stop
If an overheat alarm occurs, the drive decelerates to stop using the selected deceleration
time. If a digital output is programmed for “fault” (H2-01/02/03 = 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” (H2-01/02/03 = 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” (H2-01/02/03 = 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 is continued but the speed is reduced to the level
set in parameter L8-19. If after 10 s the OH alarm is still present, the speed is reduced once
more. The amount of reduction depends on how often the alarm repeats. If the oH alarm
disappears while the drive is operating at a reduced speed, then the drive will switch back to
the previous speed it was reduced to before. Figure 1.86 explains the operation with reduced
speed during oH alarm. A digital output programmed for 4D is switched when the oH alarm
is still active after ten reduction cycles.
No. Name Setting Range Default
L8-03 Overheat Alarm Operation 0 to 4 3
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