Limiting The Output Frequency (Maximum/Minimum Frequency) - Mitsubishi Electric FR-F820-04750 Instruction Manual

Parameters
CAUTION:
E
When the emergency drive operation is performed, the operation is continued or the retry is
repeated even when a fault occurs, which may damage or burn the inverter and motor. Before
restarting the normal operation after using this function, make sure that the inverter and motor
have no fault. Any damage of the inverter or the motor caused by using the emergency drive
function is not covered by the warranty even within the guarantee period.
5.7.9

Limiting the output frequency (maximum/minimum frequency)

Motor speed can be limited. Clamp the output frequency at the upper and lower limits.
Pr.
1
H400
2
H401
18
H402
For the FR-F820-02330(55K)or lower and FR-F840-01160(55K) or lower.
For the FR-F820-03160(75K)or higher and FR-F840-01800(75K) or higher.
Setting the maximum frequency (Pr. 1, Pr. 18)
● Set Pr. 1 "Maximum frequency" to the upper limit of the output frequency. If the value of the
frequency command entered is higher than the setting, the output frequency is clamped at the
maximum frequency.
● To operate at a frequency higher than the 120 Hz, adjust the upper output frequency limit with
Pr. 18 "High speed maximum frequency". (When setting a frequency in Pr. 18, the Pr. 1 setting
automatically changes to the frequency set in Pr. 18. Also, when setting a frequency in Pr. 1, the
Pr. 18 setting automatically changes to the frequency set in Pr. 1.)
Output frequency
(Hz)
Pr. 1
Pr. 18
Clamped at the
minimum frequency
Setting the minimum frequency (Pr. 2)
● Set Pr. 2 "Minimum frequency" to the lower limit of the output frequency.
● If the set frequency is Pr. 2 or less, the output frequency is clamped at Pr. 2 (will not fall below Pr. 2).
FR-F800
Name
120 Hz
Maximum frequency
Minimum frequency
120 Hz
High speed maximum
frequency
Clamped at the
maximum frequency
Frequency setting
Pr. 2
5, 10 V
0
(4 mA) (4
(20 mA)
Initial Setting
Description
value range
0 to 120 Hz Set the upper limit of the output frequency.
60 Hz
0 Hz 0 to 120 Hz Set the lower limit of the output frequency.
0 to 590 Hz Set when operating at 120 Hz or higher.
60 Hz
Fig. 5-61:
Maximum and minimum output frequency
(H) Protective function parameter
I002590E
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