(A) Application parameters
538
PARAMETERS
NOTE
• It takes about 10 seconds for tuning to complete. (The time depends on the inverter capacity and motor type.)
• Satisfy the required inverter start conditions to start offline auto tuning. For example, stop the input of MRS signal.
• To force tuning to end, use the MRS or RES signal or press on the operation panel.
(Turning the start signal (STF signal or STR signal) OFF also ends tuning.)
• During offline auto tuning, only the following I/O signals are valid. (Initial value)
Input terminals <valid signals> STP (STOP), OH, MRS, RT, RES, STF, STR, S1 and S2
Output terminals: RUN, OL, IPF, FM/CA, AM, A1B1C1 and SO
• When the rotation speed and the output frequency are selected for terminals FM/CA and AM, the progress status of offline
auto tuning is output in fifteen steps from FM/CA and AM.
• During execution of offline auto tuning, do not switch the second function selection signal (RT) ON or OFF. Auto tuning is not
executed properly.
• Since the RUN signal turns ON when tuning is started, caution is required especially when a sequence which releases a
mechanical brake by the RUN signal has been designed
• When executing offline auto tuning, input the run command after switching ON the main circuit power (R/L1, S/L2, T/L3) of
the inverter.
•While Pr.79 Operation mode selection = "7", turn the PU operation external interlock (X12) signal ON to tune in the PU
operation mode.
• Monitor is displayed on the operation panel (FR-DU08) and parameter unit (FR-PU07) during tuning as below.
• When offline auto tuning ends, press on the operation panel during PU operation. For External operation, turn OFF
the start signal (STF signal or STR signal).
This operation resets the offline auto tuning, and the PU's monitor display returns to the normal indication.
(Without this operation, next operation cannot be started.)
• At tuning completion, the tuning results are set in the following parameters:
NOTE
• 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. However, the tuning data is cleared when performing all parameter clear.
status Parameter unit (FR-PU07) display Operation panel (FR-DU08) display
Setting
Tuning in progress
Normal end
Forced end
Parameter Name
90 Motor constant (R1)
298 Frequency search gain
96 Auto tuning setting/status
STOP PU
11
READ:List
FWD PU
12
STF
TUNE
STOP PU
13
STF
TUNE
COMPLETION
Flickering
STOP PU
8
TUNE
ERROR
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