Chapter 12 Description of Parameter Settings
MH300
When you enable the over-current stall prevention, the drive’s acceleration time is longer than the
setting.
When the over-current stall prevention occurs because the motor capacity is too small or operates
in the default, decrease the Pr.06-03 setting value.
When you encounter any problem with the acceleration time, refer to the following guides for
troubleshooting.
1. Increase the deceleration time to a suitable value.
2. Set Pr.01-44 Auto Acceleration / Deceleration Setting to 1, 3 or 4 (auto-acceleration)
Related parameters:
Pr.01-12, 01-14, 01-16, 01-18 Acceleration Time 1–4)
Pr.01-44 Auto Acceleration / Deceleration Setting
Pr.02-13 Multi-function Output 1 (Relay 1)
Pr.02-16–02-17 Multi-function Output 2–3 (MO1, 2)
Over-current Stall Prevention during Operation
Default: 120 / 180
Settings
Normal duty: 0–150% (100% corresponds to the rated current of the drive)
Heavy duty: 0–200% (100 % corresponds to the rated current of the drive)
This is a protection for the drive to decrease output frequency automatically when the motor over-
loads abruptly during constant motor operation.
If the output current exceeds the setting value for Pr.06-04 when the drive is operating, the drive
decreases output frequency (according to Pr.06-05) to prevent the motor from stalling. The lower
limit for the over-current stall prevention is determined by the maximum value among 0.5 Hz,
Pr.01-07 and Pr.01-11.
If the output current is lower than the setting value for Pr.06-04, the drive accelerates (according
to Pr.06-05) again to the setting frequency.
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