Load Pattern Selection (Pr.14) - Mitsubishi Electric F700 Instruction Manual

Adjust the output torque of the motor (current)
Do not set a small value as the stall prevention operation current.
Otherwise, torque generated will reduce.
Always perform test operation.
Stall prevention operation during acceleration may increase the acceleration time.
Stall prevention operation performed during constant speed may cause sudden speed changes.
Stall prevention operation during deceleration may increase the deceleration time, increasing the
deceleration distance.
♦ Parameters referred to ♦
⋅ Pr.73 Analog input selection
⋅ Pr. 178 to Pr.189 (Input terminal function selection)
⋅ Pr. 190 to Pr. 196 (output terminal function selection)
⋅ Pr. 570 Multiple rating setting
3.2.5

Load pattern selection (Pr.14)

You can select the optimum output characteristic (V/F characteristic) for the application and load
Pr. 13
characteristics.
page 76
Pr.15
page 69
Parameter
Number
14 Load pattern selection
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 140)
100%
Pr.3 Base frequency
Output frequency (Hz)
100%
Pr.3 Base frequency
Output frequency (Hz)
♦ Parameters referred to ♦
Pr. 0 Torque boost
Pr.1 Maximum frequency
Pr.3 Base frequency
Pr.60 Energy saving control selection
Pr.80 Motor capacity (simple magnetic flux vector control)
Pr. 178 to Pr.189 (Input terminal function selection)
60
Refer to page 125
Refer to page 61
Name
(1) For constant-torque load (setting "0")
⋅ At or less than the base frequency voltage, the output voltage varies linearly with
the output frequency.
⋅ Set this value when driving the load whose load torque is constant if the speed
varies, e.g. conveyor, cart or roll drive.
POINT
If the load is a fan or pump, select "For rated 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
(2) For variable-torque load (setting "1", initial vale)
⋅ 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.
Refer to page 53
Refer to page 62
Refer to page 64
Refer to page 118
CAUTION
Refer to page 85
Refer to page 91
Initial Value Setting Range
0
1
1
Refer to page 54
Refer to page 85
Description
For constant torque load
For variable-torque loads,