Networking Solution for CNC Control Systems
The initial solution was for the engineers to use CNC (Computer Numerical Control) to run a new manufacturing program. This solution requires off-line development in the design room, and then manual transfer of the program to the factory floor PC using a floppy disk or USB Storage. The factory floor PC will implement the program by sending instructions to various manufacturing machines over an RS-232 interface connection. However, the environment of the factory floor is not suitable for PCs (due to high humidity, oily and dusty surroundings, and extreme temperatures); it is highly probably that PCs in such environments will crash frequently.
Moxa's NPort® 5110 and NPort® W2150 Plus device servers were chosen since they meet all of the requirements. The NPort® is perfectly suited for rugged environments and is much smaller than a PC.
The control center sends instructions to the CNC in TCP/IP packet format through an Ethernet/Wireless connection to the NPort®. It is no longer necessary for personnel to physically transport the program to the site, and multiple CNC machines can receive the data simultaneously.
Advantages of implementing this solution:
•System costs are reduced by lower equipment expenses (the cost of NPort® is much lower than a PC) and by the time and human resources saved.
•Changing the CNC layout when expanding is quick and easy.
•Moxa's driver technology reroutes COM data through the computer's Ethernet card; users do not need to spend time to make changes to their existing manufacturing programs.
•Centralized feedback of the CNC's status ensures organized and simplified maintenance.
•Wireless NPort® save on cabling costs and time.
•Small size for easy installation
•Reliable serial-to-Ethernet solution for data transmission
•Monitoring and troubleshooting utilities are included
NPort® W2150 Plus
• 802.11a/b/g wireless connectivity to a CNC
•Seamless roaming with a user-definable signal strength threshold
•Off-line port buffering and serial data log
•Secure data access with WEP, WPA, WPA2, and secure remote management with SSH/SSL configurations