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Load Pattern Selection (pr. 14) - Mitsubishi Electric FR-E700 Instruction Manual

Fr-e740-016 to 300 - ec; fr-e720s-008 to 110 - ec.
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Set V/F pattern
4.6.2

Load pattern selection (Pr. 14)

You can select the optimum output characteristic (V/F characteristic) for the application and load characteristics.
Parameter
Number
14
Load pattern selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 179)
Pr. 14 = 0
100%
Pr. 3 Base frequency
Output frequency (Hz)
POINT
If the load is a fan or pump, select for constant-torque load (setting "0") in any of the following cases.
When a blower of large inertia moment (J) is accelerated in a short time
For constant-torque load such as rotary pump or gear pump
When load torque increases at low speed, e.g. screw pump
Pr. 14 = 1
100%
Pr. 3 Base frequency
Output frequency (Hz)
92
Name
Initial Value
(1)
Constant-torque load application (setting "0", initial value)
At or less than the base frequency, the output voltage varies linearly with the output
frequency.
Set this value when driving the load whose load torque is constant even if the speed
varies, e.g. conveyor, cart or roll drive.
(2)
Variable-torque load application (setting "1")
At or less than the base frequency, 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.
V/F
V/F
V/F
Setting Range
0
1
0
2
3
Description
For constant-torque load
For variable torque load
For constant-torque elevators
(at reverse rotation boost of 0%)
For constant-torque elevators
(at forward rotation boost of 0%)

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