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Failsafe of the system which uses the inverter
2) Checking the inverter operating status by
the inverter operation ready completion
signal
Operation ready signal (RY signal) is
output when the inverter power is on and
the inverter becomes operative.
Check if the RY signal is output after
powering on the inverter.
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 RUN signal is output when inputting the start signal to the inverter (forward
signal is STF signal and reverse signal is STR signal). For logic check, note that RUN
signal is output for the period from the inverter decelerates until output to the motor is
stopped, configure a sequence considering the inverter 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 currents flows in the motor. Check if Y12 signal is output when inputting the start
signal to the inverter (forward signal is STF signal and reverse signal is STR signal).
Note that the current level at which Y12 signal is output is set to 120% of the inverter
rated current in the initial setting, it is necessary to adjust the level to around 20%
using no load current of the motor as reference with Pr.48 "Output current detection
level".
For logic check, as same as the inverter running signal (RUN signal), the inverter
outputs for the period from the inverter decelerates until output to the motor is
stopped, configure a sequence considering the inverter deceleration time.
Output
signal
Pr. 64, Pr. 65
Setting
y When using various signals, assign functions to
Pr. 64, Pr. 65 (output terminal function selection)
referring to the table on the left.
ABC 99
RY 11
RUN 0
Y12 12
CAUTION
•Changing the terminal assignment using Pr. 64, Pr. 65 (output terminal
function selection) may affect the other functions. Make setting after
confirming the function of each terminal.
Time
Power
supply
Output frequency
STF
RH
RY
Reset
processing
Pr. 13 "starting frequency"
ON OFF
ON OFF
ON OFF
ON
DC injection brake
operation point
DC injection
brake operation
RUN
ON OFF