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Powerdrive F300 User Guide 119
Issue Number: 2
Use Pr 00.005 to select the required frequency/speed reference as
follows:
Pr 00.006 limits the maximum output current of the drive (and hence
maximum motor torque) to protect the drive and motor from overload.
Set Pr 00.006 at the required maximum torque as a percentage of the
rated torque of the motor, as follows:
(%)
Where:
T
R
Required maximum torque
T
RATED
Motor rated torque
Alternatively, set Pr 00.006 at the required maximum active (torque-
producing) current as a percentage of the rated active current of the
motor, as follows:
(%)
Where:
I
R
Required maximum active current
I
RATED
Motor rated active current
6.3.4 Voltage boost, (open-loop), Speed-loop PID
gains (RFC-A / RFC-S)
Open-loop
There are seven voltage modes available, which fall into three
categories, vector control, fixed boost and single phase current output.
For further details, refer to section 8.1.1 Open loop motor control on
page 151.
RFC-A/ RFC-S
Pr 00.007 (03.010) operates in the feed-forward path of the speed-
control loop in the drive. See Figure 11-4 Menu 3 RFC-A, RFC-S logic
diagram on page 188 for a schematic of the speed controller. For
information on setting up the speed controller gains, refer to section
8 Optimization on page 151.
Open-loop
When Open-loop Control Mode (00.007) is set at Fd or SrE, set
Pr 00.008 (05.015) at the required value for the motor to run reliably at
low speeds.
Excessive values of Pr 00.008 can cause the motor to be overheated.
RFC-A/ RFC-S
Pr 00.008 (03.011) operates in the feed-forward path of the speed-
control loop in the drive. For information on setting up the speed
controller gains See section 11-4 Menu 3 RFC-A, RFC-S logic
diagram on page 188. For information on setting up the speed controller
gains, refer to section 8 Optimization on page 151.
Open-loop
Set Pr 00.009 (05.013) at 0 when the V/f characteristic applied to the
motor is to be fixed. It is then based on the rated voltage and frequency
of the motor.
00.005 {01.014} Reference Selector
RW Txt US
OL
Ú
A1 A2 (0),
A1 Preset (1),
A2 Preset (2),
Preset (3), Keypad (4),
Precision (5),
Keypad Ref (6)
Ö
A1 A2 (0)
RFC-A
RFC-S
Setting Description
A1 A2 0
Analog input 1 OR analog input 2 selectable by
digital input, terminal 26
A1 Preset 1 Analog input 1 OR preset frequency/speed
A2 Preset 2 Analog input 2 OR preset frequency/speed
Preset (3) 3 Pre-set frequency/speed
Keypad (4) 4 Keypad mode
Precision (5) 5 Precision reference
Keypad Ref (6) 6 Keypad Reference
00.006 {04.007} Symmetrical Current Limit
RW Num US
OL
Ú
±VM_MOTOR1_
CURRENT_LIMIT %
Ö
165 %
RFC-A
175 %
RFC-S
00.006[]
T
R
T
RATED
--------------------
100×=
00.006[]
I
R
I
RATED
-------------------
100×=
00.007 {05.014} Open-loop Control Mode (OL)
00.007 {03.010} Speed Controller Proportional Gain Kp1 (RFC)
RW
Txt /
Num
US
OL
Ú
Ur S (0), Ur (1),
Fixed (2), Ur Auto (3),
Ur I (4), Square (5),
Current 1P (6)
Ö
Ur I (4)
RFC-A
Ú
0.0000 to 200.000 s/rad
Ö
0.0300 s/rad
RFC-S
00.008 {05.015} Low Frequency Voltage Boost (OL)
00.008 {03.011} Speed Controller Integral Gain Ki1 (RFC)
RW Num US
OL
Ú
0.0 to 25.0 %
Ö
3.0 %
RFC-A
Ú
0.00 to 655.35 s
2
/rad
Ö
0.10 s
2
/rad
RFC-S
00.009 {05.013} Dynamic V to F Select (OL)
00.009 {03.012}
Speed Controller Differential Feedback Gain
Kd 1 (RFC)
RW Bit US
OL
Ú
Off (0) or On (1)
Ö
Off (0)
RFC-A
Ú
0.00000 to
0.65535 1/rad
Ö
0.00000 1/rad
RFC-S
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