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7.1.2 Adjusting Speed Feedback
With open-loop vector control, internal Inverter data is used to calculate the feedback value. The gain of
this automatic frequency regulator (AFR) operation can be fine-tuned according to motor response. (Nor-
mally it isn't necessary to change the default setting.)
Speed Feedback Detection Control (AFR) Gain: C8-08
J
User
User
Constant
Number
C8-08
Normally it isn't necessary to change this setting.
D
Fine-tune the gain when motor operation is unstable causing hunting to occur or torque/speed respon-
D
siveness is low.
When hunting occurs, increase the gain by 0.05 increments while checking the motor responsive-
ness.
When responsiveness is low, decrease the gain by 0.05 increments while checking the motor re-
sponsiveness.
7.1.3 Setting/Adjusting Motor Constants
Adjusting the V/f Pattern: E1-04 through E1-10, E1-13
J
Normally it isn't necessary to adjust the V/f pattern with open-loop vector control. Adjust the V/f pattern
when you want to change the maximum output frequency setting or decrease the Inverter's output voltage
or when stalls are occurring during no-load operation.
To increase the motor's rated speed, increase the maximum output frequency in E1-04 in programming
mode after autotuning.
It is possible to make user-defined V/f pattern settings (E1-04 through E1-10) in open-loop vector control
mode. (The preset V/f patterns cannot be selected.)
User
User
Constant
Number
E1-04
E1-05
E1-06
E1-07
E1-08
E1-09
E1-10
E1-13
* 1. These voltages are for 200 V class Inverters; double the voltage for 400 V class Inverters.
* 2. The default setting depends on the Inverter's capacity. The default settings shown in the table
are for 200 V class, 0.4 to 1.5 kW Inverters. (See page NO TAG.)
Note 1.The default settings for E1-07 through E1-10 depend on the control method. The default
settings shown in the table are for open-loop vector control. (See page NO TAG.)
2. The four frequency settings must satisfy the following formula:
3. When making the V/f characteristics a straight line, set the same value in E1-07 (middle
output frequency) and E1-09 (minimum output frequency). In this case, constant E1-08
(middle output frequency voltage) will be disregarded.
4. If E1-13 is set to 0.0, the same value as in E1-13 will be set for E1-05. It does not normally
need to be set separately.
Change
during
during
Name
Opera-
tion
AFR gain
Change
during
during
Name
Opera-
tion
Max. output
frequency
Max. voltage
Base frequency
Mid. output
frequency
Mid. output
frequency voltage
Min. output frequency
Min. output
frequency voltage
Base voltage
E1-04 (F
)
E1-06 (F
) > E1-07 (F
MAX
A
- 5
7.1 O pen-loop Vector Control
Setting
Setting
Factory
Factory
Unit
Open Loop
Range
Setting
0.00 to
Mul-
1.00
10.00
tiple
Setting
Setting
Factory
Factory
Unit
Open Loop
Range
Setting
40.0 to
Hz
60.0
400.0
0.0 to 255.0
*1
VAC
200.0
*1
0.0 to 400.0
Hz
60.0
*2
0.0 to 400.0
Hz
3.0
0.0 to 255.0
11.0
VAC
*1
*1 *2
0.0 to 400.0
Hz
0.5
0.0 to 255.0
2.0
VAC
*1
*1 *2
0.0 to 255.0
VAC
0.0
)
E1-09 (F
)
B
MIN
Valid Access Levels
Flux Vector
Vector
A
Valid Access Levels
Flux Vector
Vector
Q
Q
Q
Q
Q
Q
A
A
Q
A
A
Q
Q
7
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