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Offline auto tuning (Pr. 80 to Pr. 96)
PARAMETERS
3
5) When tuning was ended forcibly
Tuning is ended forcibly by pressing or turning off the start signal (STF or STR) during tuning.
In this case, offline auto tuning has not ended properly.
(The motor constants have not been set.)
Perform an inverter reset and restart tuning.
3.12.4 Utilizing or changing offline auto tuning data for use
<Setting the motor constants as desired>
Pr. 90 to Pr. 94 (motor constants) may be set as desired in either of two ways; the data measured in the offline auto
tuning are read and utilized or changed, or the motor constants are set without the offline auto tuning data being
used.
<Operating procedure>
1. Set the following value in Pr. 71 :
• Mitsubishi standard motor.............................................................................Pr. 71 = "4"
• Mitsubishi constant-torque motor..................................................................Pr. 71 = "14"
• Mitsubishi standard motor SF-JR (4P) (1.5kW or less) ................................ Pr. 71 = "24"
• SF-V5RU, SF-VR..........................................................................................Pr. 71 = "34"
2. Set "801" in Pr. 77.
(The parameter values of Pr. 82 "motor excitation current" and Pr. 90 to Pr. 94 (motor constants) can be
displayed. Though the parameter values of other than Pr. 82 and Pr. 90 to Pr. 94 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.
REMARKS
1. The motor constants measured once in the offline auto tuning are stored as parameters and their data are held until the
offline auto tuning is performed again.
2. An instantaneous power failure occurring during tuning will result in a tuning error. After power is restored, the inverter
goes into the ordinary operation mode. Therefore, when STF (STR) is on, the motor runs in the forward (reverse) rotation.
3. Any alarm occurring during tuning is handled as in the ordinary mode. Note that if an error retry has been set, retry is
ignored.
4. The set speed monitor displayed during the offline auto tuning is 0r/min.
CAUTION
Note that the motor may start running suddenly.
When the offline auto tuning in the rotation mode is used in vertical lift application, e.g. an elevator, it
may drop due to insufficient torque.
Parameter Number Name Setting Range Setting Increments Factory Setting
82 Motor excitation current (no load current) 0 to ****, 9999 1 9999
90 Motor constant R1 0 to ****, 9999 1 9999
91 Motor constant R2 0 to ****, 9999 1 9999
92 Motor constant L1 0 to ****, 9999 1 9999
93 Motor constant L2 0 to ****, 9999 1 9999
94 Motor constant x 0 to ****, 9999 1 9999
859 Torque current 0 to ****, 9999 1 9999
REMARKS
When "0" (factory setting) is set in Pr. 684 "tuning data increment switchover", the motor constants are set in "internal variable
increment". When "1" is set in Pr. 684, the motor constants are set in "mH,
Ω, A". (can be set when Pr. 77 = "801")
REMARKS
1. Set "9999" in Pr. 90 to Pr. 94 to use the standard motor constants (including those for the constant-torque motor).
2. Set "3 (standard motor), "13" (constant-torque motor) or "23" (Mitsubishi standard SF-JR(4P) 1.5kW or less) in Pr. 71 to
use the constants measured in the offline auto tuning. Set "4, 14 or 24" in Pr. 71 and change the motor constants to
change the values measured in the offline auto tuning.
3. As the motor constants measured in the offline auto tuning have been converted into internal data (****), refer to the
following setting example when making setting:
Setting example: To slightly increase Pr. 90 value (5%)
When Pr. 90 is displayed "2516", set 2642, i.e. 2516 × 1.05=2641.8, in Pr. 90. (The value displayed has been converted
into a value for internal use. Hence, simple addition of a given value to the displayed value has no significance.)
4. When "1" is set in Pr. 96, the last values of Pr. 82, Pr. 92, and Pr. 93 remain unchanged.
STOP
RESET