Hitachi X200 Series - Manual (Page 158)

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.
Option
Code
Terminal
Symbol
Function Name State Description
ON When assigned input transitions OFF to ON,
inverter latches trip event and displays E12.
12 EXT External Trip
OFF No trip event for ON to OFF, any recorded trip
events remain in history until Reset.
Valid for inputs: C001~C005
Required settings (none)
Notes:
• If the USP (Unattended Start Protection)
feature is in use, the inverter will not
automatically restart after canceling 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.
Example (requires input configuration—
see
page 3–49 ):
See I/O specs on page 4–6.
5 4 3 2 1 L PCS P24
EXT
[EXT] terminal
t
1
0
Motor revolution speed
[RS] terminal
1
0
Alarm output terminal
1
0
Run command [FW,RV]
1
0
Free run
4−19
Operatio
ns and
Monitori
ng