## 5 Conclusions  
In conclusion, the implementation of an energy and air consumption monitoring system for the WIEDEMANN Turret Punch Press (TPP) at Mitsubishi Electric Air Conditioning Systems Europe Ltd. (M-ACE) has demonstrated significant operational, financial, and sustainability benefits. By retrofitting this legacy machine with an IIoT-based monitoring solution, the factory has gained real-time visibility into its energy and compressed air consumption, facilitating data-driven decision-making for improved efficiency and cost reduction. The integration of KEYENCE MP-F series sensors, along with an energy monitoring module and Ethernet communication via Modbus TCP/IP, has enabled continuous monitoring of power and air usage trends, allowing for the identification of inefficiencies that were previously undetectable. One major discovery was a persistent air leak, which had led to substantial compressed air waste and unnecessary energy consumption. By implementing a smart shut-off valve that automatically stops air flow when the machine is idle, the system successfully eliminated air leakage, reducing compressed air consumption by 83.34% and contributing to substantial energy savings. Additionally, the monitoring system provides real-time anomaly detection, allowing operators to detect irregularities, monitor machine operation remotely, and make necessary adjustments to optimize performance. The seamless integration of collected data into the factory's network further enhances operational oversight, offering an effective platform for visualizing consumption trends, identifying optimization opportunities, and making informed maintenance decisions. Beyond immediate cost savings, this project demonstrates the broader potential of IIoT-based retrofitting for industrial energy efficiency. The 56% reduction in energy consumption highlights the value of modernizing older machines rather than replacing them, making this approach a scalable and cost-effective solution for other industrial settings. This study underscores the critical role of IIoT in smart manufacturing, promoting sustainable production practices while reducing operational costs and environmental impact. Moving forward, this framework can be extended to additional machines and processes, reinforcing M-ACE's commitment to sustainability, efficiency, and continuous innovation in industrial energy management. Despite the successful deployment of the energy and air consumption monitoring system at M-ACE, several challenges were encountered. One key limitation was the factory's 24/7 production cycle, which left minimal opportunities for sensor installation and system integration, requiring careful planning to avoid disruptions. Additionally, the cost of sensors, power modules, and network components posed a challenge for scalability, \begin{table}
\begin{tabular}{l l l l l l l l} \hline \hline \multicolumn{1}{c}{**Before Implementation of the Shut-Off Valve**} & & & & & & & \\ \hline Month & February-24 & March-24 & April-24 & May-24 & June-24 & July-24 & August-24 & September-24 \\ \hline Air consumption (m\({}^{3}\)) & 3408.73 & 3264.56 & 4270.07 & 3181.41 & 3641.69 & 4114.95 & 4226.66 & 6336.03 \\ \hline \multicolumn{1}{c}{Average air consumption (m\({}^{3}\))} & & & & & & & \\ \hline \multicolumn{1}{c}{**After Implementation of the Shut-Off Valve**} & & & & & & & \\ \hline Month & October-24 & \multicolumn{1}{c}{
\begin{tabular}{l} November-24 \\ \end{tabular} } & & & & & & & \\ \hline Air consumption (m\({}^{3}\)) & 1074.33 & 360.37 & 591.92 & & & & \\ \hline \multicolumn{1}{c}{Average air consumption (m\({}^{3}\))} & & & & & & & \\ \hline \hline \end{tabular}
\end{table} 
Table 2: Machine’s monthly air consumption before and after shut-off valve implementation. as expanding the system to additional machines would require significant investment. The need for additional network cabling and IP address configuration for each sensor further added to this complexity.