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.

[EXT] terminal

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

free run

 

Motor revolution speed

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

[RS] terminal

0

 

 

 

 

 

 

 

 

 

 

Alarm output terminal

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN command [FW, RV]

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

t

Operations and Monitoring

Option

Terminal

Function Name

Input

 

 

Description

Code

Symbol

State

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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,

Example (requires input configuration—

C005

 

 

 

 

see page 3–47):

 

 

 

 

Required settings:

(none)

 

 

 

 

 

EXT

 

 

 

 

 

L

5

4

3

2

1

PCS

 

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-toON transition), a keypad Reset command, or an [RS] intelligent terminal input signal.

See I/O specs on page 4–6.