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Load Pattern Selection (pr. 14) - Mitsubishi Electric FR-F700PJ Instruction Manual

Air-conditioning inverter.
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4.6.2

Load pattern selection (Pr. 14)

Optimum output characteristic (V/F characteristic) for the application and load characteristics can be selected.
Parameter
Name
Number
14
Load pattern selection
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 197)
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)
REMARKS
 When the RT signal is ON, the other second functions are also valid.
NOTE
 Changing the terminal assignment using Pr. 178 to Pr. 182 (input terminal function selection) may affect the other
functions. Set parameters after confirming the function of each terminal.
Parameters referred to
Pr. 3 Base frequency
Pr. 178 to Pr. 182 (input terminal function selection)
V/F
V/F
V/F
Initial Value
1
(1)
Constant-torque load application (setting "0")
 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", initial value)
 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.
Refer to page 103
Refer to page 134
Setting Range
0
For constant-torque load
1
For variable-torque load
V/F pattern
Description
105
4

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