1.Overview

A food processing enterprise has an automated packaging production line, which needs to carry out packaging operations for products of different specifications. The speed of the conveyor belt in the packaging process and the action sequence and speed of various packaging machines need to be precisely controlled to adapt to the packaging requirements of different products, while ensuring production efficiency and packaging quality. Due to the diverse product types and frequent switching, the traditional fixed control method is difficult to meet the requirements of rapid and flexible adjustment. Therefore, a control system that can realize complex logical control and is easy to program and operate is needed. The simple PLC function of the FGI FD100M series frequency inverters has become an ideal choice.

2. Implementation Plan

Equipment Selection and Connection

According to the power and load characteristics of each motor on the packaging production line, select the corresponding specifications of the FGI FD100 series frequency inverters. For example, a 3kW frequency converter is selected for the conveyor belt motor, and a 1.5kW frequency converter is selected for the sealing machine motor, etc. Install the frequency converters correctly in the control cabinet and make electrical connections with motors, sensors, controllers and other equipment. Ensure that the wiring is firm and the shielding is good to reduce the impact of electromagnetic interference on the system operation.

Install photoelectric sensors at the starting position of the conveyor belt and key packaging stations to detect the position and status information of products and connect these signals to the digital input ports of the frequency converters to provide trigger conditions for the logical control of the simple PLC.

3.Application Advantages

Improve Production Efficiency: The simple PLC function of the FGI FD100M series frequency inverters enables the packaging production line to quickly and accurately adapt to the packaging requirements of different products, reducing the downtime and adjustment time caused by product switching. Through precise speed control and action sequence control, the connection between each packaging link is closer, and the overall production efficiency is significantly improved. Compared with the traditional control method, the output has increased by about 20%.

Enhance Product Quality: Precise control of each link in the packaging process ensures the stability of quality indicators such as the adhesion of packaging materials, the tightness of seals, and the pasting position of labels. For example, under the precise control of the simple PLC, the sealing quality of the sealing machine is more reliable, reducing the problems of product leakage or deterioration caused by poor sealing, effectively improving the product qualification rate and market competitiveness.

Reduce Equipment Maintenance Costs: The fault diagnosis and alarm function of the frequency converters can detect abnormal situations in the equipment operation in time and provide detailed fault information, enabling maintenance personnel to quickly locate and solve problems, avoiding equipment damage and long-term downtime caused by the expansion of faults. At the same time, through reasonable speed and load control, the wear and energy consumption of motors are reduced, the service life of equipment is extended, and the maintenance and operation costs of equipment are reduced.

Increase Production Flexibility: Since different control logics and process parameter settings can be easily realized through simple PLC programming, the enterprise can quickly respond to market changes and meet the diverse needs of customers for different product packaging. Whether it is the change of product specifications or the adjustment of packaging processes, it can be realized by modifying the programs of the frequency converters in a relatively short time, greatly improving the production flexibility and adaptability of the enterprise.