Load Pattern Selection (Pr. 14) - Mitsubishi Electric FR-A700 Instruction Manual

Parameter
6.9.2

Load pattern selection (Pr. 14)

You can select the optimum output characteristic (V/f characteristic) for the application and load
characteristics.
Pr.
Name
No.
14
Load pattern selection
For constant-torque load (Pr. 14 = 0, initial value)
At or less than the base frequency voltage, the output voltage varies linearly with the output fre-
quency. Set this value when driving the load whose load torque is constant even if the speed var-
ies, e.g. conveyor, cart or roll drive.
100
For variable-torque load (Pr. 14 = 1)
At or less than the base frequency voltage, the output voltage varies with the output frequency
in a square curve. Set this value when driving the load whose load torque varies in proportion
to the square of the speed, e.g. fan or pump.
100
FR-A700 EC
Initial
Setting Range Description
Value
0
1
2
3
0
4
5
[ % ]
Pr. 3 Base frequency
Output frequency
[ % ]
Pr. 3 Base frequency
Output frequency
V/F V/F V/F
For constant torque load
Quadratisches Lastmoment
For constant torque elevators
(at reverse rotation boost of
0%)
For constant torque elevators
(at forward rotation boost of
0%)
RT signal on ... for constant
torque load
RT signal off ... for constant
torque elevators at reverse
rotation boost of 0%
RT signal on ... for constant
torque load
RT signal off ... for constant
torque
elevators at forward rotation
boost of 0%
Fig. 6-60:
Constant-torque load
Hz
Fig. 6-61:
Variable-torque load
Hz
Set V/f pattern
Parameters referred to
0 Torque boost
3 Base frequency
178–189 Input terminal func-
tion selection
Advanced magnetic
flux vector control
Real sensorless vec-
tor control
Refer to
Section
6.7.1
6.9.1
6.14.1
6.7.2
6.2.2
I001322C
I001323C
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