External Trip - Hitachi WJ200 Series Instruction Manual

4−24

External Trip

When the terminal [EXT] is turned ON, the inverter enters the trip state, indicates
error code
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.
[EXT] terminal
Motor revolution speed
[RS] terminal
Alarm output terminal
Run command [FW,RV]
Option Terminal
Code Symbol
EXT
12
Valid for inputs:
Required settings
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.
12, and stops the output. This is a general purpose interrupt type feature,
E
1
0
1
0
1
0
1
0
Function Name
External Trip
C001~C007
(none)
ON
Free run
ON
ON
ON
State
ON When assigned input transitions OFF to ON,
inverter latches trip event and displays
OFF No trip event for ON to OFF, any recorded trip
events remain in history until Reset.
Example (requires input configuration—
see page 3–84):
7 6 5
See I/O specs on
ON
Description
E12
EXT
4 3 2 1 L
PCS PLC
page 4–6.
t
P24