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Frequency Jump (pr. 31 To Pr. 36) - Mitsubishi Electric FR-A500 Instruction Manual

Transistorized inverter.
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Note: 1. The Pr. 70 setting is invalid for the inverter of 11K or more.
2. Pr. 70 "regenerative brake duty" indicates the %ED of the built-in brake transistor operation. Its
setting should not be higher than the setting of the brake resistor used. Otherwise, the brake
resistor can overheat.
3. The X10 signal may be replaced by the MRS signal.
4. When terminal assignment is changed using Pr. 180 to Pr. 186, the other functions may be
affected. Check the functions of the corresponding terminals before making setting.
The Pr. 70 setting must not exceed the setting of the brake resistor used. Otherwise,
the brake resistor can overheat.

4.2.16 Frequency jump (Pr. 31 to Pr. 36)

Pr. 31 "frequency jump 1A"
Pr. 32 "frequency jump 1B"
Pr. 33 "frequency jump 2A"
Pr. 34 "frequency jump 2B"
Pr. 35 "frequency jump 3A"
Pr. 36 "frequency jump 3B"
When it is desired to avoid resonance attributable to the natural frequency of a mechanical system, these
parameters allow resonant frequencies to be jumped. Up to three areas may be set, with the jump
frequencies set to either the top or bottom point of each area.
The value set to 1A, 2A or 3A is a jump point and operation is performed at this frequency.
Parameter
Factory
Number
Setting
31
9999
32
9999
33
9999
34
9999
35
9999
36
9999
<Setting>
• To fix the frequency at 30Hz between Pr. 33 and Pr. 34 (30Hz and 35Hz), set
35Hz in Pr. 34 and 30Hz in Pr. 33.
• To jump to 35Hz between 30 and 35Hz, set 35Hz in Pr. 33 and 30Hz in Pr. 34.
Note: 1. During acceleration/deceleration, the running frequency within the set area is valid.
Setting Range
Remarks
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
9999: Function invalid
0 to 400Hz, 9999
9999: Function invalid
WARNING
Pr.36
Pr.35
Pr.34
Pr.33
Pr.32
Pr.31
86
PARAMETERS
Frequency jump
Pr.34:35Hz
Pr.33:30Hz
Pr.33:35Hz
Pr.34:30Hz

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