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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

Free run

 

 

Motor revolution speed

 

 

[RS] terminal

1

 

0

 

Alarm output terminal

1

 

0

 

Run command [FW,RV]

1

 

0

t

 

 

Option

Terminal

Function Name

State

Description

Code

Symbol

 

 

 

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.

Operations and Monitoring

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):

 

 

EXT

 

 

 

 

 

5

4

3

2

1

L

PCS

P24

See I/O specs on page 4–6.

Page 158
Image 158
Hitachi X200 Series instruction manual 19, External Trip