Chapter 9 Inverter Functions
9-0-3
9.9 Using Trip Prevention Functions .................................................................................................... 9-9-1
9.9.1 Restriction to Avoid Overload .................................................................................................... 9-9-1
9.9.2 Restriction to Avoid Overcurrent ............................................................................................... 9-9-3
9.9.3 Suppressing Overvoltage by Controlling Output Frequency ................................................ 9-9-4
9.9.4 Suppressing Overvoltage by Controlling Output Voltage ...................................................... 9-9-6
9.9.5 Suppressing Overvoltage with Braking Resistor ...................................................................... 9-9-8
9.9.6 Restarting after Instantaneous Power Failure/Undervoltage ................................................ 9-9-9
9.9.7 Restarting after Overvoltage/Overcurrent ............................................................................ 9-9-14
9.9.8 Continuing to Drive Even after Instantaneous Power Failure/Undervoltage Error ......... 9-9-17
9.10 Using System Protection Functions ........................................................................................... 9-10-1
9.10.1 Adjusting Carrier Frequency ................................................................................................. 9-10-1
9.10.2 Automatically Reducing Carrier Frequency ....................................................................... 9-10-2
9.10.3 Externally Tripping the Inverter ............................................................................................ 9-10-3
9.10.4 Preventing Unattended Start at Power-on ......................................................................... 9-10-4
9.10.5 Avoiding Mechanical Resonance of Motor and Machine ................................................. 9-10-5
9.10.6 Selecting Cooling Fan Operation ......................................................................................... 9-10-6
9.10.7 Monitoring Motor Temperature ........................................................................................... 9-10-7
9.11 Outputting Warning Signals to Terminals .................................................................................. 9-11-1
9.11.1 Outputting an Alarm Signal ................................................................................................... 9-11-1
9.11.2 Outputting a Major Failure Signal ........................................................................................ 9-11-2
9.11.3 Outputting a Warning When Overload Occurs .................................................................. 9-11-3
9.11.4 Outputting a Warning When Current Is Low ...................................................................... 9-11-4
9.11.5 Outputting a Warning before Electronic Thermal Protection .......................................... 9-11-5
9.11.6 Outputting a Warning When Cooling Fin Temperature Rises.......................................... 9-11-6
9.11.7 Outputting a Warning for Capacitor Life on the Control Board ...................................... 9-11-7
9.11.8 Outputting a Warning for Cooling Fan Life ......................................................................... 9-11-8
9.11.9 Outputting a Warning When RUN Time or Power-on Time Elapses ............................... 9-11-9
9.11.10 Detecting Analog Input Disconnection/Out of Range ................................................. 9-11-10
9.12 Outputting Running Status to Terminals ................................................................................... 9-12-1
9.12.1 Outputting a Signal during Running .................................................................................... 9-12-1
9.12.2 Outputting a Signal during Forward/Reverse Running .................................................... 9-12-2
9.12.3 Outputting a Signal When RUN Command Is Given ......................................................... 9-12-3
9.12.4 Outputting a Signal When Inverter Is Ready to Run .......................................................... 9-12-4
9.13 Outputting Signals According to the Output Frequency.......................................................... 9-13-1
9.13.1 Outputting a Signal When the Output Frequency Reaches the Target .......................... 9-13-1
9.13.2 Outputting a Signal When the Output Frequency Exceeds the Set Value ..................... 9-13-2
9.13.3 Outputting a Signal When the Output Frequency Is Close to the Set Value ................. 9-13-3
9.13.4 Outputting a Signal When the Output Frequency is Close to 0 Hz ................................ 9-13-4
9.13.5 Outputting a Signal by Combining Two Output Signals ................................................... 9-13-5
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