Hitachi SJ100 Series Instruction Manual page 118

4–14
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. When the
switch between the set terminals [EXT] and [P24] is turned on, the equipment enters the
trip state. Even when the switch to [EXT] 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.
Motor revolution speed
Alarm output terminal
RUN command [FW, RV]
Option Terminal
Code Symbol
12 EXT
Valid for inputs:
Required settings:
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 another Run command (off-to-on
transition).
[EXT] terminal
[RS] terminal
Input
Function Name
State
External Trip ON
OFF
C01, C02, C03, C04, C05, C06
(none)
free run
Description
When assigned input transitions Off to On,
inverter latches trip event and displays E12
No trip event for On to Off, any recorded trip
events remain in history until Reset
Example:
EXT
L 6 5 4 3
See I/O specs on page 4–5.
time
FW
P24
2 1