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Using Intelligent Input Terminals
Operations
and Monitoring
4–20
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.
[EXT] terminal
RUN command [FW, RV]
[RS] terminal
Motor revolution speed
Alarm output terminal
t
free run
1
0
1
0
1
0
1
0
1
0
Option
Code
Terminal
Symbol
Function Name
Input
State
Description
12 EXT External Trip 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
Valid for inputs:
C001, C002, C003, C004,
C005
Required settings:
(none)
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.
Example (requires input configuration—
see page 3–42
):
See I/O specs on page 4–6
.
EXT
12345L
PCS