Mitsubishi Electric FATEC FR-A800 Manual page 49

3
MAINTENANCE SYSTEM DESIGN
3) Checking the inverter operating status by the start signal input to the inverter and inverter
running signal
The inverter running signal (RUN signal) is output when the inverter is running. (RUN signal
is assigned to terminal RUN in the initial setting.)
Check if Y12 signal is being output while inputting a start signal to the inverter. (STF signal is
a forward rotation signal, and STR is a reverse rotation signal.) Even after the start signal is
turned OFF, the RUN signal is kept output until the inverter makes the motor to decelerate
and to stop. For the logic check, configure a sequence considering the inverter's
deceleration time.
4) Checking the motor operating status by the start signal input to the inverter and inverter
output current detection signal
The output current detection signal (Y12 signal) is output when the inverter operates and
current flows into the motor.
Check if Y12 signal is being output while inputting a start signal to the inverter. (STF signal is
a forward rotation signal, and STR is a reverse rotation signal.) Adjust the current level that
outputs the Y12 signal to around 20% using no load current of the motor as reference with
M460 (Pr.150) Output current detection level.
As well as the inverter running signal (RUN signal), the Y12 signal is kept output until the
inverter decelerates and stops the output to the motor even after the start signal is turned
OFF. For the logic check, configure a sequence considering the inverter's deceleration time.
3.2 Failsafe system which uses the inverter
44
Output terminal function selection
Output
parameter setting value
signal
Positive logic
ALM 99
RY 11
RUN 0
Y12 12
• Changing the terminal assignment using output terminal function selection may
affect the other functions. Set parameters after confirming the function of each
terminal.
• When using each signal, refer to the left
table and assign the functions to the
Negative logic
output terminals.
199
111
100
112