L100 Inverter

4–15

Analog Input Current/Voltage Select

The [AT] terminal selects whether the inverter uses the voltage [O] or current [OI] input terminals for external frequency control. When the switch between the terminals [AT] and [P24] is on, it is possible to set the output frequency by applying a current input signal at [OI]-[L]. When the terminal is turned off, the voltage input signal at [O]-[L] is available. Note that you must also set parameter A1 = 01 to enable the analog terminal set for controlling the inverter frequency.

Option

Terminal

Function Name

Input

 

 

Description

 

 

 

 

Code

Symbol

State

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

16

AT

Analog Input

ON

Terminal OI is enabled for current input (uses

 

 

Voltage/current

 

terminal L for power supply return)

 

 

 

 

 

Select

 

 

 

 

 

 

 

 

 

 

 

 

OFF

Terminal O is enabled for voltage input (uses

 

 

 

 

 

 

 

terminal L for power supply return)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Valid for inputs:

C01, C02, C03, C04, C05

Example:

AT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Required settings:

A01 = 01

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

L

5

4

3

2

1

P24

 

 

 

 

 

 

 

 

 

Notes:

If the [AT] option is not assigned to any intelligent input terminal, then inverter uses the algebraic sum of both the voltage and current inputs for the frequency command (and A01=01).

When using either the analog current and voltage

 

 

 

 

 

 

 

 

input terminal, make sure that the [AT] function is

H

O

OI

L

FM

CM2

12

11

allocated to an intelligent input terminal.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Be sure to set the frequency source setting A01=01

to select the analog input terminals.

 

 

 

 

 

 

 

 

 

4-20 mA when AT= On

 

 

 

 

 

 

 

 

 

 

 

 

 

 

+ –

 

 

 

 

0-10 V when AT= Off

 

 

 

 

 

 

 

 

 

 

 

 

See I/O specs on page 4–5.

Operations and Monitoring

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Page 106
Image 106
Hitachi L100 instruction manual Analog Input Current/Voltage Select, Symbol State

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.