Messung CP 5221-BO

The Messung CP 5221-BO is a high-performance CPU module from the Nexgenie 5000 Series PLC family, manufactured by Messung Systems (an Indian automation pioneer that was formerly associated with Mitsubishi).

This CPU is widely used in medium-to-large-scale industrial automation for tasks ranging from packaging and textiles to water treatment and pharmaceutical processes.

1. Processing and Performance

The CP 5221-BO is designed to handle complex logic with high reliability.¹

• Architecture: 32-bit high-speed processor.

• Program Capacity: 64 KB of memory, which allows for substantial ladder logic and data processing.

• Execution Speed: Highly efficient processing of instructions, suitable for machines requiring fast response times.²

   

• Retentive Memory: Features built-in memory protection to ensure data is not lost during power interruptions.

2. Connectivity and Communication

One of the strengths of the Nexgenie 5000 series is its communication flexibility.

• COM 1 (RS-232): Standard port for PC programming (using Nexgenie software) and HMI connection.

• COM 2 (RS-485): Integrated port supporting Modbus RTU (Master/Slave). This is commonly used to network the PLC with VFDs (Variable Frequency Drives), temperature controllers, or other PLCs.

• Expansion Bus: Features a high-speed backplane bus to connect digital/analog I/O modules, communication modules, and specialty modules.³

   

3. Technical Specifications

4. Key Features

• Modular Design: The CPU is part of a rack-based system. You can easily expand the system by adding I/O modules to the base plate as your automation needs grow.

• Diagnostics: Features front-panel LED indicators for Power, Run, Error, and Communication status, allowing for quick troubleshooting on the factory floor.

• Ladder & Instruction List: Supports standard programming languages, making it familiar to engineers who have worked with Mitsubishi or similar industrial controllers.

• Robust Construction: Built to withstand the electrical noise and temperature fluctuations common in industrial environments.

5. Maintenance and Troubleshooting

• Battery: The CPU uses an internal battery to maintain the program and RTC. If the “BAT” or “ERR” LED flashes, the battery should be replaced to avoid losing the program in the RAM.

• Error Codes: Most system faults can be diagnosed through the programming software’s “Monitor” mode, which provides specific error codes for I/O mismatches or arithmetic overflows.