L100 Inverter

4–11

Free-run Stop

When the terminal [FRS] is turned on, the inverter stops the output and the motor enters the free-run state (coasting). If terminal [FRS] is turned off, the output resumes sending power to the motor if the Run command is still active. The free-run stop feature works with other parameters to provide flexibility in stopping and starting motor rotation.

In the figure below, parameter B88 selects whether the inverter resumes operation from 0 Hz (left graph) or the current motor rotation speed (right graph) when the [FRS] terminal turns off. The application determines which is the best setting.

Parameter B03 specifies a delay time before resuming operation from a free-run stop. To disable this feature, use a zero delay time.

 

B88 = 00

 

Resume from motor speed

B88 = 01

Motor

Zero-frequency start

 

Motor

B03 wait time

 

 

 

speed

 

 

speed

 

Switches

 

time

Switches

time

FRS

 

 

FRS

 

FW, RV

 

 

FW, RV

 

(Run)

 

 

(Run)

 

Option

Terminal

Function Name

Input

 

 

 

Description

 

 

 

 

Code

Symbol

State

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11

FRS

Free-run Stop

ON

Causes output to turn off, allowing motor to free

 

 

 

 

run (coast) to stop

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

OFF

Output operates normally, so controlled deceler-

 

 

 

 

ation stops motor

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valid for inputs:

C01, C02, C03, C04, C05

Example:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

FW FRS

 

 

 

 

Required settings:

B03, B88, C11 to C15

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

 

5

4

3

 

2

1

P24

 

Notes:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When you want the [FRS] terminal to be active low (normally closed logic), change the setting (C11 to C15) which corresponds to the input (C01 to C05) that is assigned the [FRS] function.

Operations and Monitoring

See I/O specs on page 4–5.

Page 102
Image 102
Hitachi L100 instruction manual Free-run Stop, Option Terminal Function Name Input Description Code Symbol

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.