Operating Instructions

Descriptions of Parameter Settings

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● Use the upper and lower limit output frequency settings to limit the actual output frequency. If the output

frequency setting is higher than the upper limit (Pr.01-10), the drive runs with the upper limit frequency. If the

output frequency setting is lower than the lower limit (Pr.01-11) but higher than the minimum output frequency

(Pr.01-07), the drive runs with the lower limit frequency. Set the upper limit frequency > the lower limit

frequency (Pr.01-10 setting value must be > Pr.01-11 setting value).

● The upper output frequency limits the drive’s maximum output frequency. If the frequency setting for the

Frequency command is higher than Pr.01-10, the drive runs with the Pr.01-10 setting.

● If the PID feedback control is enabled for the drive, the drive’s output frequency may exceed the Frequency

command but is still limited by this setting.

● Related parameters: Pr.01-00 Maximum Operation Frequency, Pr.01-11 Output Frequency Lower Limit.

Fig. 35:

● The lower output frequency limits the drive’s minimum output frequency. If the frequency setting for the

Frequency command is lower than Pr.01-11, the drive runs with the Pr.01-11 setting.

● When the drive starts, it operates according to the V/F curve and accelerates from the minimum output

frequency (Pr.01-07) to the setting frequency. The drive is not limited by the lower output frequency settings.

● Use the output frequency upper and lower limit settings to prevent operator misuse, overheating caused by the

motor’s operating at a too low frequency, or mechanical wear due to a too high speed.

● If the output frequency upper limit setting is 50 Hz and the frequency setting is 60 Hz, the maximum output

frequency is 50 Hz.

● If the output frequency lower limit setting is 10 Hz and the minimum output frequency setting (Pr.01-07) is 1.5

Hz, then the drive operates at 10 Hz when the Frequency command is higher than Pr.01-07 but lower than 10

Hz. If the Frequency command is lower than Pr.01-07, the drive is in ready status without output.

● If the frequency output upper limit is 60 Hz and the frequency setting is also 60 Hz, only the Frequency

command is limited at 60 Hz. The actual output frequency may be higher than 60 Hz if used for slip

compensation.