Omron VARISPEED G7 -, Instruction Manual

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6
-128
Related Constants
Setting Precautions
•
Droop control is disabled if b7-01 is set to 0.0.
•
Set b7-01 to the amount of slip as the percentage of slip when the maximum output frequency is input and
the rated torque is generated.
•
Constant b7-02 is used to adjust the responsiveness of droop control. Increase this setting if oscillation or
hunting occur.
Setting the Droop Control Gain
Set the droop control gain as the speed reduction at a 100% motor torque, as a percentage of the maximum
output frequency.
Fig 6.73 Droop Control Gain
Zero-servo Function
The zero-servo function holds the motor when the motor is stopped in what is call a zero-servo status. This
function can be used to stop the motor even with an external force acts on the motor or the analog reference
input is offset.
Con-
stant
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vec-
tor
Open
Loop
Vector
2
b7-01
Droop control
gain Sets the slip as a percentage of
maximum frequency when the
maximum output frequency is
specified and the rated torque
occurs.
Droop-control is not performed
when the setting is 0.0.
0.0 to
100.0
0.0 Yes No No No A A
Droop Quantity
b7-02
Droop control
delay time
Droop control responsiveness
constant
When hunting or oscillation
occurs, increase the value.
0.03 to
2.00
0.05 s No A A A A A
Droop Delay
Time
Torque
Speed
Speed reference 0
100%
b7-01