Mitsubishi Electric 800 Series Instruction Manual page 431

(C) Motor constant parameters
Performing tuning
POINT POINT
• Before performing tuning, check the monitor display of the operation panel or the parameter unit if the inverter is in the state
ready for tuning. (Refer to 2) below.) Turning ON the start command while tuning is unavailable starts the motor.
• In the PU operation mode, press
For External operation, turn ON the start command (STF signal or STR signal). Tuning will start.
NOTE
• 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
(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 <effective signals>: STP (STOP), OH, MRS, RT, RES, STF, and STR
Output terminals: RUN, OL, IPF, FM, AM, and A1B1C1
• When the rotation speed and the output frequency are selected for terminals FM and AM, the progress status of offline auto
tuning is output in fifteen steps from FM and AM.
• Do not perform ON/OFF switching of the Second function selection (RT) signal during offline auto tuning. Auto tuning will not
be performed properly.
• Setting offline auto tuning (Pr.96 Auto tuning setting/status = "1 or 101") will make pre-excitation invalid.
• When the offline auto tuning is selected (Pr.96 Auto tuning setting/status = "101"), the motor rotates. Take caution and
ensure the safety.
• Since the Inverter running (RUN) signal turns ON when tuning is started, pay close attention 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.
Pr.96 setting value
(1) Setting
(2) During tuning
(3) Normal completion
• Note: Offline auto tuning time (with the initial setting)
Offline auto tuning setting
No motor rotation (Pr.96 = "1")
With motor rotation (Pr.96 = "101)
• 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.)
430
PARAMETERS
/ on the operation panel.
1 101
Parameter unit display
READ:List READ:List
TUNE TUNE
1
STOP PU STOP
TUNE
TUNE
2
STF FWD PU
STF FWD
TUNE
3
TUNE
COMPLETION
COMPLETION
STF STOP PU
STF STOP PU
Approx. 25 to 120 s
(The time depends on the inverter capacity and motor type.)
Approx. 40 s
(The following offline auto tuning time is set according to the acceleration/deceleration time
setting. Offline auto tuning time = acceleration time + deceleration time + approx. 30 s)
on the operation panel during PU operation. For External operation, turn OFF
on the operation panel.
1
Operation panel display
AutoTune
TUNE
101
--- STOP
PU
PREV
AutoTune
TUNE
102
STF FWD
PU
PREV
AutoTune
TUNE
103
Completed
STF STOP
PREV
Time
101
12:34 AutoTune
TUNE
1
PU --- STOP
NEXT PREV
12:34 AutoTune
TUNE
2
PU STF FWD
NEXT PREV
12:34 AutoTune
TUNE
3
Completed
PU STF STOP
NEXT PREV
12:34
101
PU
NEXT
12:34
102
PU
NEXT
12:34
103
PU
NEXT