Mitsubishi Electric FR-D720-0.2K-G, Инструкция по эксплуатации

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88
Limiting the rotation speed
4.6.2 Avoiding mechanical resonance points (speed jumps) (Pr. 31 to Pr. 36)
The above parameters can be set when Pr. 160 Extended function display selection =
"
0
"
. (Refer to page 161.)

The value left of the slash is for the 2.2K drive unit or lower. The one right of the slash is for the 3.7K drive unit.

If a value exceeding the upper speed limit of the motor is set, the actual operation will be limited at the maximum rotation speed. The setting range is for the
S-PM motor. The maximum setting value differs depending on the number of poles of the applied motor.
When it is desired to avoid resonance attributable to the natural speed of a mechanical system, these parameters allow
resonant frequencies to be jumped.
Parameter
Number
Name Initial Value Setting Range Description
31 Speed jump 1A
9999
0 to 12000r/min /
0 to 8000r/min 
1A to 1B, 2A to 2B, 3A to 3B are speed
jumps
9999: Function invalid
32 Speed jump 1B
33 Speed jump 2A
34 Speed jump 2B
35 Speed jump 3A
36 Speed jump 3B

Up to three areas may be set, with the jump speeds 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 in
the jump zone is performed at these speeds.
Example 1 To fix the speed to 900r/min in the range of 900r/min to 1050r/min, set 1050r/
min in
Pr. 34
and 900r/min in
Pr. 33
.
Example 2 To jump the speed to 1050r/min in the range of 900r/min to 1050r/min, set
1050r/min in
Pr. 33 and 900r/min in Pr. 34 .
NOTE
During acceleration/deceleration, the running speed within the set area is valid.
Pr. 31
Pr. 32
Pr. 33
Pr. 34
Pr. 35
Pr. 36
Speed jump
Set speed (r/min)
Pr. 34 : 1050r/min
Pr. 33 : 900r/min
Pr. 33 : 1050r/min
Pr. 34
: 900r/min