External Trip - Hitachi SJ200 Series Instruction Manual

4–20
Using Intelligent Input Terminals

External Trip

When the terminal [EXT] is turned ON, the inverter enters the trip state, indicates error
code E12, and stops the output. This is a general purpose interrupt type feature, and the
meaning of the error depends on what you connect to the [EXT] terminal. Even if the
[EXT] input is turned OFF, the inverter remains in the trip state. You must reset the
inverter or cycle power to clear the error, returning the inverter to the Stop Mode.
In the graph below, the [EXT] input turns ON during normal Run Mode operation. The
inverter lets the motor free-run to a stop, and the alarm output turns ON immediately.
When the operator initiates a Reset command, the alarm and error are cleared. When the
Reset is turned OFF, the motor begins rotation since the Run command is already active.
Motor revolution speed
Alarm output terminal
RUN command [FW, RV]
Option Terminal
Code Symbol
12 EXT
Valid for inputs:
Required settings:
Notes:
•
If the USP (Unattended Start Protection) feature is
in use, the inverter will not automatically restart
after cancelling the EXT trip event. In that case, it
must receive either another Run command (OFF-to-
ON transition), a keypad Reset command, or an
[RS] intelligent terminal input signal.
1
[EXT] terminal
0
1
0
1
0
[RS] terminal
1
0
1
0
Input
Function Name
External Trip
C001, C002, C003, C004,
C005, C006
(none)
free run
State
ON When assigned input transitions OFF to ON,
inverter latches trip event and displays E12
OFF No trip event for ON to OFF, any recorded trip
events remain in history until Reset
Example (requires input configuration—
see page 3–41):
L 6
See I/O specs on page 4–6.
Description
EXT
5 4 3 2 1 PCS
t