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Chapter 4
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.
Item
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.
Operation commands FW
and RV
EXT terminal
Motor speed
RS terminal
Alarm output terminal
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.
Item
Terminal [1] to [8] functions
STA
STP
F/R
Output frequency
Function code
Data
C001 to C008
12
Function code
Data
20
C001 to C008
21
22
ON
OFF
ON
Forward
rotation
Reverse
rotation
4-57
Explanation of Functions
Related code
C001 to C008: Terminal [1] to [8] functions
Description
EXT: External trip
Free running
Related code
C001 to C008: Terminal [1] to [8] functions
Description
STA: Starting the motor
STP: Stopping the motor
F/R: Switching the motor operation direction
OFF
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