Modernization of a Pasteurized Egg Product Production Line Based on Mitsubishi Electric Controllers

Efficient automation plays a crucial role in ensuring product quality and process reliability in the food and pharmaceutical industries.

This project demonstrates a successful modernization of two used production lines for pasteurized liquid egg products that did not initially meet the required technological standards.

Project Background

Two previously operated foreign production lines were purchased and installed at a local facility. Upon inspection, the equipment — both mechanical components and control software — did not comply with the production technology adopted by the enterprise.

To restore proper functionality, the automation system required partial replacement of instrumentation, reconfiguration of the control system, and redevelopment of the software. One of the lines was equipped with a Mitsubishi Electric MELSEC AnS controller
and an E300 operator panel, while the second line used a controller from another manufacturer.

Technical Implementation

During modernization, part of the instrumentation was replaced and new Endress+Hauser (E+H) sensors were installed and configured. The Mitsubishi PLC and operator panel software were completely rewritten to ensure precise
process control and compliance with required technological parameters.

On the second production line, the original design relied on an industrial PC for local control and monitoring. This approach proved unreliable due to limited protection and frequent system instability. To eliminate these issues, the computer was replaced with a stationary Mitsubishi Electric E1151 operator panel, ensuring higher reliability and improved environmental resistance.

Achieved Results

After system modernization, both production lines were successfully commissioned and now operate continuously.

The Mitsubishi Electric controller provides full automation of the entire production cycle — from raw egg input and filtration to pasteurization at controlled temperature and pressure, cooling, and packaging. The system also supports both standard and chemical cleaning cycles.

The modernization of used equipment proved significantly more cost-effective than purchasing new machinery, while fully meeting the company’s technological requirements. The automated process ensures stable product quality, allows production with minimal staff
(2–3 operators), and provides flexibility for future system expansion.