Mitsubishi Electric FR-A800 Series Instruction Manual page 538

• For tuning accuracy improvement, set the following parameters when the motor constants are known in advance.
First motor
Pr.
707
724
*4 The setting is valid only when a value other than "9999" is set in both Pr.707 (Pr.744) and Pr.724 (Pr.745).
 Performing tuning
• Before performing tuning, check the monitor display of the operation panel or parameter unit if the inverter is in the state ready
for tuning. The motor starts by turning ON the start command while tuning is unavailable.
• In the PU operation mode, press
For External operation, turn ON the start command (STF signal or STR signal). Tuning starts.
NOTE
• Satisfy the required inverter start conditions to start offline auto tuning. For example, stop the input of the MRS signal.
• To force tuning to end, use the MRS or RES signal or
(Turning OFF the start signal (STF signal or STR signal) 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 (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 15 steps from FM/CA 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 with motor rotation is selected (Pr.96 Auto tuning setting/status = "101"), take caution and
ensure safety against the rotation of the motor.
• 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 operation 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 ON the PU operation external interlock (X12) signal for tuning in the PU
operation mode.
• During tuning, the monitor is displayed on the operation panel as follows.
Tuning status
(1) Setting
(2) During tuning
(3) Normal
completion
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Second
Name
motor Pr.
744 Motor inertia (integer)
745 Motor inertia (exponent)
Operation panel (FR-DU08) display
Pr.96 = "1"
Blinking
search engine
Mitsubishi Electric motor
(SF-JR, SF-HR, SF-JRCA,
SF-HRCA, SF-V5RU)
9999 (initial value)
/ on the operation panel.
on the operation panel.
Pr.96 = "101"
Blinking
Other motors
*4
Motor inertia
Jm = Pr.707 × 10^(-Pr.724) (kg·m
LCD operation panel (FR-LU08) display
Pr.96 = "1" Pr.96 = "101"
AutoTune
AutoTune 12:34
TUNE
TUNE
1
--- STOP
--- STOP PU
PREV
PREV NEXT
AutoTune
AutoTune 12:34
TUNE
TUNE
2
STF
STF FWD PU
PREV
PREV NEXT
AutoTune
AutoTune 12:34
TUNE
TUNE
3
Completed
Completed
STF STOP
STF STOP PU
PREV
PREV NEXT
5.13 (C) Motor constant parameters
1
2
2
)
3
4
5
6
7
8
9
10
12:34
101
PU
NEXT
12:34
102
FWD PU
NEXT
12:34
103
PU
NEXT
537
5. PARAMETERS