Mitsubishi Electric FR-A700 Instruction Manual page 419

Parameter
Start-time online auto tuning from external terminal (X28 signal, Y39 signal)
● 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.
Abb. 6-95: Start of online auto tuning using an external signal
● Perform offline auto tuning and set "1" (start-time tuning) in Pr. 95.
● 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 Pr. 178 to Pr. 189 (input terminal function selection)
and assign functions to the input terminal.
● When using the Y39 signal, set "39 (source logic) or 139 (sink logic)" in Pr. 190 to Pr. 196
(output terminal function selection) and assign functions to the output terminal.
NOTES
Start-time tuning is performed when the start signal is turned on during zero speed control
also.
The Y39 signal is in on status while secondary magnetic flux exists after the motor stop.
While the Y39 signal is on, the X28 signal is not valid.
The STF, STR signals are valid after completion of the start-time tuning.
Only the following output signals are valid during tuning:
IPF, THP, PU, Y12, RY, ER, LF, MT, CA, AM, A1, B1, C1, A2, B2, and C2.
Tuning is invalid during V/f control.
Changing the terminal assignment using Pr. 178 to Pr. 189 (input terminal function selection)
or Pr. 190 to Pr. 196 (output terminal function selection) may affect the other functions. Make
setting after confirming the function of each terminal.
FR-A700 EC
X28 signal
Tuning status at starting
Y39 signal
Start signal
Selection and protection of a motor
ON
Completion
Tune
Time
I001557E
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