Explanation of Function
Seite 109 / 180
Unattended start protection (USP)
The USP function is designed as a fail safe to prevent accidental
starting of the Inverter if the RUN signal is ON when the power is
restored to the Inverter.
Either resetting the Inverter or turning the RUN signal OFF can clear the trip.
If the trip is cancelled while the RUN signal is still ON then the inverter will restart automatically.
(Example2)
Assign 13(USP) to an intelligent input terminal.
Unattended start protection is shown as follows;
(Example3) When 01 (frequency matching) is selected with reset frequency matching
selection C103,
C001-C008: intelligent input
Relation code
Power supply
FW
USP
RS
Alarm
Output frequency
(Example1
Power supply
FW
USP
RS
Alarm
(Example
Output frequency
Number of motor
revolution time
Power supply
FW
Free-run
Frequency matching
Output frequency
Power supply
FW
USP
RS
Alarm
(Example2)
