Mitsubishi Electric FR-A700 Series, Техническое руководство

Страница: 214 / 550

248
PARAMETER
2.6.2 Adjustable 5 points V/F [Pr. 71, 100 to 109]
(A700)(F700)
When V/F control has been selected, set [
Pr. 71 = 2
] and
define five points as shown on the right to perform
operation in the V/F pattern connected by straight lines in
sequence.
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
region since such a machine requires large torque at a
start.
When [
Pr. 19 Base frequency voltage = 8888, 9999], [ Pr. 71 =
2 ] can not be set. Set the rated voltage value in [ Pr. 19 ] to
set [ Pr. 71 = 2 ].
The five points can be set as desired within the range of
the [
Pr. 3 Base frequency ], and [ Pr. 19 Base frequency voltage ].
Note that if you attempt to set the same frequency in any
two of the five points, an outside-of -range error occurs.
The setting of inappropriate V/F values will cause
excessive current, abnormal machine collision or vibration
during acceleration and deceleration.
When [ Pr. 71 = 2 ] is set, [ Pr. 47 Second V/F ] and [ Pr. 113 Third
V/F ] will not function.
The electronic thermal relay function calculates as
standard motor.
Adjustable 5 points V/F does not function during Advanced
magnetic flux vector control, Simple magnetic flux vector
control, Real sensorless vector control, vector control.
A700 F700
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
[ Pr. ] 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.
0, 1, 2, 20
100 V/F1 (first frequency) 9999
9999 No V/F1 setting
0 to 400Hz Set the V/F1 frequency
101 V/F1(first frequency voltage) 0V 0 to 1000V Set the V/F1 voltage
102 V/F2 (second frequency) 9999
9999 No V/F2 setting
0 to 400Hz Set the V/F2 frequency
103
V/F2 (second frequency
voltage)
0V 0 to 1000V Set the V/F2 voltage
104 V/F3 (third frequency) 9999
9999 No V/F3 setting
0 to 400Hz Set the V/F3 frequency
105
V/F3 (third frequency
voltage)
0V 0 to 1000V Set the V/F3 voltage
106 V/F4 (fourth frequency) 9999
9999 No V/F4 setting
0 to 400Hz Set the V/F4 frequency
107
V/F4 (fourth frequency
voltage)
0V 0 to 1000V Set the V/F4 voltage
108 V/F5 (fifth frequency) 9999
9999 No V/F5 setting
0 to 400Hz Set the V/F5 frequency
109 V/F5 (fifth frequency voltage) 0V 0 to 1000V Set the V/F5 voltage
A700
F700