Mitsubishi FR-A740-00023-EC, Instruction Manual

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159
Set V/F pattern
4
P
ARAME
T
E
R
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4.10.4 Adjustable 5 points V/F (Pr. 71, Pr. 100 to Pr. 109)
A dedicated V/F pattern can be made by freely setting the V/F characteristic between a startup and the base
frequency and base voltage under V/F control (frequency voltage/frequency).
The torque pattern that is optimum for the machine's characteristic can be set.
Parameter
Number
Name Initial Value Setting Range Description
71 Applied motor 0
0 to 8, 13 to 18,
20, 23, 24, 30, 33,
34, 40, 43, 44, 50,
53, 54
Set "2" for adjustable 5 points V/F
control.
100 V/F1(first frequency) 9999 0 to 400Hz, 9999
Set each points (frequency,
voltage) of V/F pattern.
9999: No V/F setting
101 V/F1(first frequency voltage) 0V 0 to 1000V
102 V/F2(second frequency) 9999 0 to 400Hz, 9999
103 V/F2(second frequency voltage) 0V 0 to 1000V
104 V/F3(third frequency) 9999 0 to 400Hz, 9999
105 V/F3(third frequency voltage) 0V 0 to 1000V
106 V/F4(fourth frequency) 9999 0 to 400Hz, 9999
107 V/F4(fourth frequency voltage) 0V 0 to 1000V
108 V/F5(fifth frequency) 9999 0 to 400Hz, 9999
109 V/F5(fifth frequency voltage) 0V 0 to 1000V
⋅
Any V/F characteristic can be provided by presetting the parameters of
V/F1 (first frequency voltage/first frequency) to V/F5
.
⋅
For a machine of large static friction coefficient and small dynamic
static friction coefficient, for example, set a V/F pattern that will
increase the voltage only in a low-speed range since such a machine
requires large torque at a start.
(Setting procedure)
1)Set the rated motor voltage in Pr. 19 Base frequency voltage . (No
function at the setting of "9999" (initial value) or "8888".)
2)Set
Pr. 71 Applied motor
to "2" (Adjustable 5 points V/F characteristic).
3)Set the frequency and voltage you want to set in
Pr. 100 to Pr. 109
.
CAUTION
⋅
Adjustable 5 points V/F characteristics function only under V/F control. They do not function under advanced magnetic flux
vector control, real sensorless vector control or vector control.
⋅
When Pr. 19 Base frequency voltage = "8888" or "9999", Pr. 71 cannot be set to "2". To set Pr. 71 to "2", set the rated voltage value in Pr. 19 .
⋅
When the frequency values at each point are the same, a write disable error ( ) appears.
⋅
Set the points (frequencies, voltages) of Pr. 100 to Pr. 109 within the ranges of Pr. 3 Base frequency and Pr. 19 Base frequency voltage .
⋅
When "2" is set in
Pr. 71
,
Pr. 47 Second V/F (base frequency)
and
Pr. 113 Third V/F (base frequency)
will not function.
⋅
When Pr. 71 is set to "2", the electronic thermal relay function makes calculation as a standard motor.
REMARKS
⋅
A greater energy saving effect can be expected by combining Pr. 60 Energy saving control selection and adjustable 5 points V/F.
⋅
For the 00170, 00250, the
Pr. 0 Torque boost
and
Pr. 12 DC injection brake operation voltage
settings are automatically changed
according to the
Pr. 71
setting as follows.
♦
Parameters referred to
♦
⋅
Pr. 3 Base frequency, Pr. 19 Base frequency voltage Refer to page 153
⋅
Pr. 12 DC injection brake operation voltage Refer to page 194
⋅
Pr. 47 Second V/F (base frequency) , Pr. 113 Third V/F (base frequency) Refer to page 153
⋅
Pr. 60 Energy saving control selection Refer to page 266
⋅
Pr. 71 Applied motor, Pr. 450 Second applied motor Refer to page 179
⋅
Advanced magnetic flux vector control Refer to page 140
⋅
Real sensorless vector control Refer to page 87
⋅
Vector control Refer to page 87
V/F V/F V/F
Base frequency
voltage
Pr.19
Base frequency
Pr.3
Torque boost
Pr.0
V/F Characteristic
0
V/F5
V/F4
V/F3
V/F2
V/F1
Frequency
Voltage
CAUTION
Set this parameter correctly according to the motor used.
Incorrect setting may cause the motor to overheat and burn.
Pr. 71
Standard Motor Setting
0, 2, 3 to 8, 20, 23, 24, 40, 43, 44
Constant Torque Motor Setting
1, 13 to 18, 50, 53, 54
Pr. 0 3% 2%
Pr. 12 4% 2%