Mitsubishi Electric FR-D720 K Series Instruction Manual page 114

Selection and protection of a motor
(3) Execution of tuning
POINT
Before performing tuning, check the monitor display of the operation panel or parameter unit (FR-PU04/FR-PU07)
if the inverter is in the status for tuning. (Refer to 2) below.) When the start command is turned ON under V/F
control, the motor starts.
1) When performing tuning for PU operation, press
(FR-PU04/FR-PU07).
For External operation, turn ON the run command (STF signal or STR signal). Tuning starts.
(Excitation noise is produced during tuning.)
REMARKS
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 terminal <valid signal>

Output terminal

Note that the progress status of offline auto tuning is output in five steps from FM when speed and output frequency are
selected.
Do not perform ON/OFF switching of the second function selection signal (RT) during execution of offline auto tuning.

Auto tuning is not executed properly.
NOTE
 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.
 When Pr. 79 Operation mode selection = "7" (PU operation interlock), turn ON the X12 signal, and tune in the PU operation
mode.
2) Monitor is displayed on the operation panel and parameter unit (FR-PU04/FR-PU07) during tuning as below.
Pr. 96 setting
(1) Setting
(2) Tuning in progress
(3) Normal end
(4) Error end
(when inverter protective
function operation is
activated)
REMARKS
 It takes approximately 9s until tuning is completed.
 The set frequency monitor displayed during the offline auto tuning is 0Hz.
110
STF, STR
RUN, SO, FM, A, B, C
Parameter Unit (FR-PU04/FR-PU07)
Display
11
READ:List
11
STOP PU
TUNE
12
STF FWD PU
TUNE
13
COMPETION
STF STOP PU
TUNE
9
ERROR
STOP PU
STF
of the operation panel or
of the operation panel. (Turning the start signal (STF
Operation Panel Indication
11
or of the parameter unit
Blinking