HITACHI frequency converter Cs-H100 series

6.2 Simple PLC and Multi speed

Through FC group parameters, users can pre-set up to 16 segments (0-15 segments) of operating frequency and time, just like using a small PLC, to achieve automated process control. Each speed can independently select one of the four acceleration and deceleration times, and real-time switching between multiple speeds can be achieved through the DI terminal.

6.3 Master slave control

The L4 group parameters are specifically designed for master-slave control functions and are suitable for situations where multiple motors drive the same load (such as large conveyor belts, converters).

The host is responsible for sending frequency or torque commands.

The slave receives commands from the host through the 485 network and can achieve precise load distribution by setting the receiving frequency coefficient [L4-04] and torque coefficient [L4-05], ensuring synchronous operation or torque balance of multiple motors.

6.4 Other Practical Functions

Swing frequency function [Fb group]: By setting the center frequency, swing amplitude, jump, and period, periodic triangular wave changes in frequency can be achieved, which is widely used in winding control in the textile and chemical fiber industries.

Counting and Counting Function [Fb Group]: Using DI terminals to receive pulse signals, achieve length or quantity statistics of products.

Brake Control [L5 Group]: Tailored for lifting equipment, it ensures safe and smooth lifting and lowering processes through reasonable logic control (such as establishing torque before releasing the brake during startup and holding the brake before releasing the torque during shutdown).

7、 Fault diagnosis and maintenance

7.1 Fault codes and handling

When the frequency converter detects an abnormality, it will immediately cut off the output (trip) and display a fault code. Chapter 5 of the manual provides a detailed list of fault codes (Err01~Err47), listing possible causes of faults and system troubleshooting strategies for each code. For example, for the common "Err04 acceleration overcurrent", possible reasons include motor short circuit, incorrect motor parameters, short acceleration time, or improper V/F torque increase.

7.2 Fault Records

The U0 parameter set is a powerful diagnostic tool that can record the detailed inverter status during the last three faults, including fault frequency, current, bus voltage, input/output terminal status, cumulative power on time, etc. This is crucial for analyzing the root cause of intermittent faults.

7.3 Daily and Regular Maintenance

The manual recommends daily inspections (such as running sound, vibration, and cooling fans) and regular inspections (such as loose screws, clean air ducts, and corrosion). It is particularly pointed out that the lifespan components of the frequency converter - cooling fan (2-3 years) and filtering electrolytic capacitor (4-5 years) - are closely related to environmental temperature and maintenance conditions, and preventive replacement should be considered upon expiration.