Yaskawa VS-626 MC5 - Manual (Page 163)

7.3 Common Functions
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J Prohibited Frequencies (Jump Frequencies): d3-01 to d3-04
D This function allows the prohibition or “jumping” of certain frequencies within the Inverter’s output
frequency range so that the motor can operate without resonant oscillations caused by some machine
systems.
D It is also used for deadband control.
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting Open Loop
Vector
Flux Vector
d3-01 Jump frequency 1 0.0 to 400.0 Hz 0.0 B B
d3-02 Jump frequency 2 0.0 to 400.0 Hz 0.0 B B
d3-03 Jump frequency 3 0.0 to 400.0 Hz 0.0 B B
d3-04 Jump frequency width 0.0 to 20.0 Hz 1.0 B B
D To disable this function, set the jump frequency references (d3-01 to d3-03) to 0.0 Hz.
D For d3-01 to d3-03, set the center values of the frequencies to be jumped. Be sure to set the jump fre-
quency so that d3-03
% d3-02 % d3-01.
D For d3-04, set the jump frequency bandwidth. The jump frequency r the jump frequency bandwidth
becomes the jump frequency range.
D Operation is prohibited within the jump frequency range, but changes during acceleration and decel-
eration are smooth with no jumps.
D The relation between the internal frequency reference and the set frequency references is shown in Fig-
ure 7.14.
d3-04
d3-03 d3-02 d3-01
Internal frequency reference
Set frequency reference
Dotted lines show operation during
acceleration/deceleration.
Fig
7.14 Setting Prohibited Frequencies
J Hold Reference Memory Selection: d4--01
D Constant d4--01 is enabled by making either of the following settings for the multi--function inputs
(H1--01 to H1--06).
x Acceleration/deceleration ramp hold (setting: A)
x Up command (setting: 10)/down command (setting: 11)
D When hold status is established by these external signals, specify whether or not the output frequency
is to be retained.
D When this function is enabled, operation is re--started after power--up using the frequency reference
value that was retained.
User
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
during
Opera-
tion
Setting
Range
Unit
Factory
Setting Open Loop
Vector
Flux Vector
d4-01
Frequency reference
hold function selection
0 1 -- 0 A A
D Settings
Setting Contents
0 Disabled. Restart after operation stoppage or power--up begins at zero.
1 Enabled. Restarr after operation stoppage or power--up begins at the held frequency reference.
D For information regarding the acceleration/deceleration stop (hold) command and the up/down com-
mand, refer to the decription of Multi--function Input (H1).
J Trim Control Level: d4--02
D The trim control level is valid when the trim control increase command (setting: 1C) or trim control
decrease command (setting: 1D) is set for a multi--function input (H1--01 to H1--06).
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