Mitsubishi Electric FR-A700 Technical Manual page 243

(2) Start-time online auto tuning from external
terminal (X28 signal, Y39 signal)
[Pr. 95 = 1, Pr. 574 = 1]
By turning ON the start-time tuning signal (X28)
before the start signal (STF or STR) turns ON (at a
stop), online tuning is performed and a starting delay
after start signal turns ON due to tuning can be
avoided.
Perform offline auto tuning and set [Pr. 95 = 1].
When the start-time tuning completion signal (Y39) is
OFF, start-time tuning with the X28 signal is
performed. Start-time tuning ends within 500ms
maximum.
When using the X28 signal, set 28 in any of [Pr. 178 to
Pr. 189 Input terminal function selection] to assign the
function to the input terminal.
When using the Y39 signal, set 39 (positive logic) or
139 (negative logic) in any of [Pr. 190 to Pr. 196 Output
terminal function selection] to assign the function to the
output terminal.
(Hz)
ON
X28 signal
Tuning status
Completion
at starting
Tune
Y39 signal
Start signal
*1 Start-time tuning is performed when the start
signal is turned ON during zero speed control
or servo lock also.
*2 The Y39 signal is in ON status while
secondary magnetic flux exists after the
motor stop.
*3 While the Y39 signal is ON, the X28 signal is
not valid.
*4 The STF, STR signals are valid after
completion of the start-time tuning.
*5 Only the output signals below are valid
during tuning.
IPF, THP, PU, Y12, RY, ER, LF, MT, FM, AM,
A1, B1, C1, A2, B2, C2
<Other operation timing chart>
ON
OFF
X28 Signal
Tune
Tuning status
Completed
at starting
Secondary magnetic
flux exists a few seconds
ON
OFF
Y39 signal
Y39 signal is OFF when the motor is stopped
and X28 is turned OFF. However if the
secondary magnetic flux exists after motor stop,
the signal remains ON.
OFF
Start signal
Tuning is performed at start when X28 signal is OFF
ON (even when Y39 is ON).
X28 Signal
OFF
Tune
Tune
Tuning status
Completed
at starting
Secondary magnetic
flux exists a few seconds
ON
Y39 signal
OFF
OFF
Start signal
Output
frequency
0Hz
ON
X28 Signal OFF
Tune
Tuning status
Completed
at starting
ON
OFF
Y39 signal
OFF
Start signal
Output
frequency
0Hz
277
PARAMETER
ON ON ON
Tune Tune
Completed
Completed
Secondary magnetic
flux exists a few seconds
ON ON
Tuning is not
performed if the
Y39 signal is ON.
Tune
Completed Completed
Secondary magnetic
flux exists a few seconds
Time
Tuning is not performed at start since X28 signal
and Y39 signal are ON.
Time
2