Reference Constants: D; Frequency Reference Function: D2-01, D2-02; Prohibited Frequency (Jump Frequency): D3-01 To D3-04; Upper And Lower Limits Of The Frequency Reference - YASKAWA VARISPEED-616G5 Instruction Manual

7.5.3 Reference Constants: d

Frequency Reference Function: d2-01, d2-02

J
The frequency reference function sets the output frequency upper and lower limits.
D
When the frequency reference is zero and a run command is input, the motor operates at the frequency
D
reference lower limit (d2-02). The motor will not operate, however, if the lower limit is set lower than
the minimum output frequency (E1-09).
User User
Constant
Number
Frequency reference
d2-01
upper limit
Frequency reference
d2-02
lower limit
The frequency reference upper and lower limits are set as a percentage of the maximum output fre-
D
quency (E1-04), in increments of 1%.
The upper and lower limits of the frequency reference are shown in Figure 7.30.
D
Internal frequency reference
Frequency reference
upper limit (d2-01)
Frequency reference
lower limit (d2-02)
Fig 7.30

Prohibited Frequency (Jump Frequency): d3-01 to d3-04

J
This function allows the prohibition or "jumping" of certain frequencies within the Inverter's output
D
frequency range so that the motor can operate without resonant oscillations caused by some machine
systems.
It is also used for deadband control. The constants of the attached card can be accessed for reference
D
or to make settings by using the Basic access level (B).
User User
Constant
Number
d3-01 Jump frequency 1
d3-02 Jump frequency 2
d3-03
Jump frequency 3
Jump frequency
d3-04
width
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-
D
quency so that d3-03 ≤ d3-02 ≤ d3-01.
For d3-04, set the jump frequency bandwidth. The jump frequency ± the jump frequency bandwidth
D
becomes the jump frequency range.
Operation is prohibited within the jump frequency range, but changes during acceleration and decel-
D
eration are smooth with no jumps.
The relation between the internal frequency reference and the set frequency references is shown in Fig-
D
ure 7.31.
Change g
Setting Setting
during during
Name
Range
Opera-
tion
0.0 to 110.0
×
0.0 to 109.0
×

Upper and Lower Limits of the Frequency Reference

Change g
during during Setting Setting
Name
Opera- Range
tion
0.0 to 400.0
×
0.0 to 400.0
×
0.0 to 400.0
×
0.0 to 20.0
×
7 - 57
7.5 Common Functions
Valid Access Levels
Unit Factory Factory
V/f V/f with
Setting
Control PG
100.0 B B
%
% 0.0 B B
Set frequency reference
Valid Access Levels
Unit Factory Factory
V/f V/f with
Setting
Control PG
Hz 0.0 B B
Hz 0.0 B B
B B
Hz 0.0
B B
Hz 1.0
Open
Flux
Loop
Vector
Vector
B B
B B
7
Open
Flux
Loop
Vector
Vector
B B
B B
B B
B B