External Trip

4–12

Using Intelligent Input Terminals

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.

[EXT] terminal

Motor revolution speed [RS] terminal

Alarm output terminal RUN command [FW, RV]

free run

time

Operations and Monitoring

Option

Terminal

Function Name

Input

Description

Code

Symbol

State

EXT

External Trip

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:

C01, C02, C03, C04, C05

Example:

EXT

Required settings:

(none)

P24

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).

See I/O specs on page 4–5.

L100 specifications

The Hitachi L100 series is a versatile range of variable frequency drives (VFDs) designed to enhance performance in various industrial applications. Known for their reliability and efficiency, these drives are widely used in motors for pumps, fans, compressors, and conveyors.

One of the main features of the Hitachi L100 is its impressive control capabilities. The drive supports both scalar and vector control modes, allowing for precise speed and torque management. This flexibility ensures optimal motor performance across different load conditions. Additionally, the L100 series offers an impressive speed range, which can accommodate a wide variety of applications, from low-speed to high-speed requirements.

The L100 is equipped with built-in functionality for energy saving. By utilizing advanced control algorithms and auto-tuning features, the drive optimizes energy consumption, reducing operational costs and contributing to improved overall system efficiency. The energy-saving mode is particularly beneficial in applications where load conditions frequently change.

Another hallmark of the Hitachi L100 is its robust communication capabilities. The drive supports various communication protocols including Modbus and Ethernet, making it easy to integrate into existing control systems. This connectivity allows for real-time monitoring and diagnostics, which aids in predictive maintenance and minimizes downtime.

In terms of user-friendliness, the L100 series includes a clear, intuitive keypad that simplifies programming and operation. The drive also features a wide range of customizable parameters, enabling users to easily tailor the settings to suit specific application requirements. Additionally, the inclusion of a customizable PID controller allows users to refine process control automatically.

Safety is a priority in the design of the Hitachi L100. The drive comes with various built-in safety features such as overvoltage, overload, and short-circuit protection, ensuring reliable operation in challenging environments. Furthermore, it complies with global safety standards, making it suitable for international applications.

Lastly, the L100's compact design ensures easy installation and minimizes the space required in control cabinets. This is especially advantageous in facilities where space is at a premium. Overall, the Hitachi L100 series represents a combination of advanced technology, user-friendly features, and reliable performance, making it a popular choice for industrial automation solutions.

Hitachi L100 instruction manual External Trip

Models: L100

External Trip

Operations and Monitoring

Option

EXT

Required settings:

L100 specifications