Yaskawa G5HHP Drive - Manual (Page 218)

Advanced Operation
7.5.3 Reference Constants: d
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7.5.3 Reference Constants: d
J
Frequency Reference Function: d2-01, d2-02
D
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
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
Change
during Setting Factory
Valid Access Levels
User
Constant
Number
Name
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
d2-01
Frequency reference
upper limit
x 0.0 to 110.0 % 100.0 B B B B
d2-02
Frequency reference
lower limit
x 0.0 to 109.0 % 0.0 B B B B
D
The frequency reference upper and lower limits are set as a percentage of the maximum output frequen-
cy (E1-04), in increments of 1%.
D
The upper and lower limits of the frequency reference are shown in Figure 7.27.
Set frequency reference
Internal frequency reference
Frequency reference
upper limit (d2-01)
Frequency reference
lower limit (d2-02)
Fig 7.27 Upper and Lower Limits of the Frequency Reference
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
g
during
Opera-
tion
Setting
Range
Unit Factory
Setting V/f
Control
V/f with
PG
Open
Loop
Vector
Flux
Vector
d3-01 Jump frequency 1 x 0.0 to 150.0 Hz 0.0 B B B B
d3-02 Jump frequency 2 x 0.0 to 150.0 Hz 0.0 B B B B
d3-03 Jump frequency 3 x 0.0 to 150.0 Hz 0.0 B B B B
d3-04 Jump frequency width x 0.0 to 20.0 Hz 1.0 B B 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 frequen-
cy so that d3-03 ≦ d3-02 ≦ d3-01.
D
For d3-04, set the jump frequency bandwidth. The jump frequency ± the jump frequency bandwidth
becomes the jump frequency range.
D
Operation is prohibited within the jump frequency range, but changes during acceleration and decelera-
tion are smooth with no jumps.
D
The relation between the internal frequency reference and the set frequency references is shown in Fig-
ure 7.28.
7