Mitsubishi Electric FR-E700EX, Instruction Manual

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116
Limiting the rotation speed
4.7.2 Avoiding mechanical resonance points (Speed jump) (Pr.31 to Pr.36)
The above parameters can be set when
Pr.160 Extended function display selection
="0". (Refer to page 182)

When a value exceeding 3000 r/min is set, the rotation speed will be limited at 3000 r/min.
Also, when an S-PM geared motor is used, the maximum setting value differs depending on the drive unit capacity. (0.2 to 2.2K: 12000 r/min, 3.7K: 8000 r/
min)
When it is desired to avoid resonance attributable to the natural speed of a mechanical system, these parameters allow
resonant speeds to be jumped.
Parameter
number
Name Initial value Setting range Description
31 Speed jump 1A
9999
0 to 4800r/min

,
9999
1A to 1B, 2A to 2B, 3A to 3B is speed
jumps
9999: Function invalid
32 Speed jump 1B
9999
0 to 4800r/min

,
9999
33 Speed jump 2A
9999
0 to 4800r/min

,
9999
34 Speed jump 2B
9999
0 to 4800r/min

,
9999
35 Speed jump 3A
9999
0 to 4800r/min

,
9999
36 Speed jump 3B
9999
0 to 4800r/min

,
9999
 Up to three areas may be set, with the jump speeds set to
either the top or bottom point of each area.
 The settings of speed jumps 1A, 2A, 3A are jump points, and
operation is performed at these speeds in the jump areas.
Example 1 To fix the speed to 900r/min in the range 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 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.

Under position control, speed jump is disabled.
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