Mitsubishi Electric 800 Series Instruction Manual page 457

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
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, and STR.
Output terminals: RUN, OL, IPF, CA, AM, and A1B1C1
• When the rotation speed and the output frequency are selected for terminals CA and AM, the progress status of offline
auto tuning is output in fifteen steps from 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 and parameter unit during tuning as below.
status
Setting
Tuning in progress
Normal end
• When offline auto tuning ends, press
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:
Parameter
90
298
96
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.
456
5. PARAMETERS
5.11 (A) Application parameters
Parameter unit display
READ:List
TUNE
11
STOP PU
TUNE
12
STF FWD PU
13
TUNE
COMPLETION
STF STOP PU
on the operation panel during PU operation. For External operation, turn OFF
Name
Motor constant (R1)
Frequency search gain
Auto tuning setting/status
on the operation panel. (Turning the start signal (STF
Operation panel display
AutoTune 12:34
TUNE
11
--- STOP PU
PREV NEXT
AutoTune 12:34
TUNE
12
STF FWD PU
PREV NEXT
AutoTune 12:34
TUNE
13
Completed
STF STOP PU
PREV NEXT