3-Wire Interface Operation Function (Sta, Stp, And F/R) (C001 To C008) - Hitachi SJ700B Series Instruction Manual

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
Function code Data
C001 to C008
ON
OFF
ON
Forward
rotation
Reverse
rotation
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Chapter 4 Explanation of Functions
C001 to C008: Terminal [1] to [8] functions
12 EXT: External trip
Free running
C001 to C008: Terminal [1] to [8] functions
20 STA: Starting the motor
21 STP: Stopping the motor
F/R: Switching the motor operation
22
direction
OFF
Related code
Description
Related code
Description