Mitsubishi Electric FR-A700 Technical Manual page 338

Execution of auto tuning
When performing PU operation, press
operation panel.
For External operation, turn ON the start command
(STF signal or STR signal). Tuning starts. (Excitation
noise generates at this time.)
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.
During offline auto tuning, the following I/O signals
are the only valid signals (in the initial setting.)
Input terminal
<Valid signal>
Output terminal
* When terminal FM is assigned to output the output
frequency and speed, progress status of offline auto
tuning (full scale when ended properly) is output
(eight levels for
E700
It takes approximately 9s to complete the tuning.
• To force tuning to end
Enter signal to terminal MRS or RES, or press
during the PU operation mode. In the External
operation mode, enter signal to terminal MRS or
RES, or turn OFF the starting switch (STR or STR
signal) to end the operation.
After tuning is completed, check [Pr.96] setting.
• Ended properly...............3 or 103 is displayed.
• Ended in error ................One of 8, 9, 91, 92, and 92 is
Error
Error Cause
Display
8 Forced end
Inverter protective
9
function operation
Current limit (stall
91 prevention) function
was activated.
Converter output
92 voltage reached
75% of rated value.
Calculation error
93 A motor is not
connected.
When offline auto tuning ends, press
panel during PU operation. For External operation, turn
OFF the start signal (STF signal or STR signal) once.
of the
E700
MRS , RES , STF , STR
D700
STF , STR
RUN , FM , ABC
*
, five levels for ).
D700
displayed.
Countermeasure
Set "21" in Pr. 96 and
perform tuning again.
Make setting again.
Set acceleration /
deceleration time longer.
Set "1" in Pr. 156.
Check for fluctuation of
power supply voltage.
Check the motor wiring and
make setting again.
Set the rated current of the
motor in Pr . 9.
of the operation
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.)
When tuning ends in error, auto tuning is not performed
properly, so the frequency search gain is not set. Perform
inverter reset (refer to page 57), and re-do the tuning.
When using the motor corresponding to the following
specifications and conditions, reset [Pr. 9 Electronic thermal
O/L relay] as below after tuning is completed.
(a) When the rated power specifications of the
motor is 200/220V(400/440V) 60Hz, set 1.1
times rated motor current value in Pr. 9.
(b) When performing motor protection from
overheat using a PTC thermistor or motor with
temperature detector such as Klixon, set "0"
(motor overheat protection by the inverter is
invalid) in Pr.9.
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.
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)
372
PARAMETER
Parameter
Unit Operation Panel
(FR-PU04, FR- Indication
PU07)
21
READ:List
21
STOP PU
TUNE
22
STF FWD PU
23
TUNE
COMPLETION
STF STOP PU
TUNE
9
ERROR
STOP PU
STF
21
Flickering