Chapter 4 Explanation of Functions
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4.2.52 External trip (EXT) function
The external trip function allows you to make the inverter trip according
to the error (trip) signal generated by an external system.
To use this function, assign function "12" (EXT) to one of the terminal [1] to [8] functions (C001 to C008).
When the EXT terminal is turned on, the inverter trips with error code "E12" displayed and stops the output.
After the inverter trips with error code "E12" displayed, it will not be recovered from tripping, even when the error
signal from the external system is reset (i.e., the EXT terminal is turned off).
To recover the inverter from tripping, reset the inverter or turn the inverter power off and on.
Terminal [1] to [8] functions
Note: Do not turn on the EXT terminal after the inverter power is shut off. Otherwise, the error history may not be
stored correctly.
4.2.53 3-wire interface operation function (STA, STP, and F/R)
The 3-wire interface operation function allows you to use automatic- reset
contacts (e.g., pushbutton switches) to start and stop the inverter.
Specify "01" (control circuit terminal block) for the run command source setting (A002).
Assign function "20" (STA), "21" (STP), and "22" (F/R) to three of the terminal [1] to [8] functions (C001 to C008) to
enable the control operations described below. Assigning the STP function to an intelligent input terminal disables the
functions of the FW and RV terminals.
The figure below shows the inverter outputs according to terminal operations.
Terminal [1] to [8] functions
F/R: Switching the motor operation direction
C001 to C008: Terminal [1] to [8] functions
Operation commands FW
and RV
C001 to C008: Terminal [1] to [8] functions
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