Mitsubishi Electric 800 Series Instruction Manual page 374

While the motor is stopped
ON
X28 Signal OFF
Tune 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
While the X28 signal is ON
ON
X28 Signal OFF
Tuning is not performed at start since X28 signal
and Y39 signal is ON.
Tune
Tuning status
Completed
at starting
ON
OFF
Y39 signal
OFF
Start signal
Output
frequency
0 Hz
NOTE
• The Y39 signal remains ON as long as there is second flux even after the motor is stopped.
• The X28 signal is disabled while the Y39 signal is ON.
• The STF and STR signals are enabled after completing tuning at start.
• The Inverter running (RUN) signal is not turned ON during online auto tuning. The RUN signal is turned ON after starting
up.
• It is disabled during V/F control or PM motor control.
• Changing the terminal assignment using Pr.178 to Pr.189 (Input terminal function selection) and Pr.190 to Pr.196
(Output terminal function selection) may affect other functions. Set parameters after confirming the function of each
terminal.
ON ON ON
Tune
Completed
Completed
Secondary magnetic
flux exists a few seconds
ON ON
Tuning is not
performed if the
Y39 signal is ON.
Time
While the X28 signal is OFF
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
ON
Y39 signal
OFF
OFF
Start signal
Output frequency
0 Hz
Switching motor
Motor
First motor
switching
RT signal
ON
OFF
X28 signal
Tune
Completed
Tuning status
at starting
ON
OFF
Y39 signal
ON
Start
OFF
signal
Output
frequency
0 Hz
Tune
Completed Completed
Secondary magnetic Secondary magnetic
flux exists a few seconds flux exists a few seconds
Second motor
First motor
Y39 turns OFF when the
driven motor is switched
ON
to the second motor
Y39 turns ON due
Secondary magnetic
to the residual second
flux exists a few seconds
magnetic flux at the
first motor.
5. PARAMETERS
5.10 (C) Motor constant parameters
3
4
5
5
5
Time
6
7
8
9
Time
10
373