Avoiding Machine Resonance Points (Frequency Jump) - Mitsubishi Electric FR-CS82S-025 Instruction Manual

• To operate at a frequency higher than the 120 Hz, adjust the upper output frequency limit with
. (When a frequency is set in
frequency
a frequency is set in
Output frequency (Hz)
Pr.1
Pr.18
Pr.2
0
(4mA)
Clamped at the
minimum frequenc
 Set minimum frequency (Pr.2)
• Use
Pr.2 Minimum frequency
• If the value of the frequency command given is lower than the
frequency (does not fall below the
NOTE
• To operate with a frequency higher than 60 Hz using frequency-setting analog signals, change the Pr.125 (Pr.126) (frequency
setting gain) setting. Simply changing the Pr.1 and Pr.18 settings does not enable the operation at a frequency higher than
60 Hz.
• When Pr.15 Jog frequency is less than Pr.2, the Pr.15 setting takes precedence.
• If a jump frequency that exceeds Pr.1 (Pr.18) is set for the frequency jump, the maximum frequency setting is the set
frequency. If the jump frequency is less than the setting of Pr.2, the jump frequency is the set frequency. (The set frequency
can be equal to or lower than the minimum frequency.) When stall prevention is activated to decrease the output frequency,
the output frequency may drop to Pr.2 or below.
CAUTION
• Note that when
signal runs the motor at the frequency set in Pr.2 even if the command frequency is not given.
Parameters referred to
Pr.13 Starting frequency
page 108
Pr.15 Jog frequency
Pr.125 Terminal 2 frequency setting gain frequency, Pr.126 Terminal 4 frequency setting gain frequency
5.6.8 Avoiding machine resonance points (frequency
jump)
When it is desired to avoid resonance attributable to the natural frequency of a mechanical system, these parameters allow
resonant frequencies to be jumped.
Pr.
31
Frequency jump 1A
H420
32
Frequency jump 1B
H421
33
Frequency jump 2A
H422
34
Frequency jump 2B
H423
35
Frequency jump 3A
H424
36
Frequency jump 3B
H425
118
5. PARAMETERS
5.6 (H) Protective function parameter
, the
Pr.18
, the setting automatically changes to the frequency set in
Pr.1 Pr.18
Clamped at the
maximum frequency
Frequency setting
5､10V
(20mA)
to set the minimum output frequency.
setting).
Pr.2
is set to any value equal to or higher than the
Pr.2
page 99
Name Initial value
9999
setting automatically changes to the frequency set in
Pr.1
setting, the output frequency is clamped at the minimum
Pr.2
Pr.13 Starting frequency setting, simply turning ON the start
Setting range
The frequencies are changed in the ranges of 1A to 1B, 2A to 2B,
0 to 400 Hz,
and 3A to 3B.
9999
9999: Function disabled
Pr.18 High speed maximum
. Also, when
Pr.18
.)
Pr.1
page 134
Description