Instruction manual

121
4
PARAMETERS
<Setting the motor constant as desired>
 To set the motor constant without using the offline auto tuning data
<Operating procedure>
1. Set any of the following values in Pr. 71:
By setting any of "105 to 116", the electronic thermal relay function changes to the
thermal characteristics of the constant-torque motor when the RT signal switches on.
2. Set "801" in Pr. 77.
(Only when the Pr. 80 setting is other than "9999", the parameter values of the
motor excitation current (Pr. 82) and motor constant (Pr. 90) can be displayed.
Though the parameters other than Pr. 82 and Pr. 90 can also be displayed, they
are parameters for manufacturer setting and their values should not be changed.)
3. In the parameter setting mode, read the following parameters and set desired
values:
4. Return the Pr. 77 setting to the original value.
5. Refer to the following table and set Pr. 84:
Star Connection
Motor
Delta Connection
Motor
Setting
Standard motor 5 or 105 6 or 106
Constant-torque motor 15 or 115 16 or 116
Parameter
Number
Name Setting Range
Setting
Increments
Factory
Setting
82
Motor excitation
current
0 to 500A, 9999 0.01A 9999
90
Motor constant
(R1)
0 to 50
Ω, 9999 0.001Ω 9999
Parameter
Number
Name Setting Range
Setting
Increments
Factory
Setting
84
Rated motor
frequency
50 to 120Hz 0.01Hz 60Hz
Note:1. The Pr. 90 value may only be read when general-purpose magnetic flux
vector control has been selected.
2. Set "9999" in Pr. 90 to use the standard motor constant (including that for the
constant-torque motor).
3. If "star connection" is mistaken for "delta connection" or vice versa during
setting of Pr. 71, general-purpose magnetic flux vector control cannot be
exercised normally.
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