Mitsubishi R16CPU iQ-R Series Programmable Controller CPU

The Mitsubishi R16CPU is a high-performance CPU module belonging to the MELSEC iQ-R series programmable logic controller (PLC) platform. Engineered for advanced automation and motion control applications, this processor delivers exceptional processing speed, extensive memory capacity, and robust networking capabilities. The R16CPU is suitable for complex machine control, process automation, and high-speed production line applications requiring deterministic performance and seamless integration with Mitsubishi Electric factory automation ecosystem.

Processing Performance and Execution Speed

The R16CPU is powered by a high-speed processor with a basic instruction execution time of 0.98 nanoseconds per contact instruction, placing it among the fastest PLC CPUs in its class. Program capacity is rated at 160K steps (640 KB), providing ample memory for complex ladder logic, structured text, and sequential function chart programs. Device and label memory capacity is 1720 KB, while data memory capacity reaches 10 MB, enabling extensive data logging, recipe management, and complex data structures without external storage. The CPU supports stored program repeated operation control methodology, ensuring deterministic execution cycles suitable for time-critical applications. Multi CPU system architecture allows up to four CPU modules to operate in parallel within a single iQ-R series base rack, enabling distributed processing for high-precision motion control and system redundancy. Motion control capabilities include position, speed, torque, and advanced synchronous control functions, making the R16CPU suitable for multi-axis coordinated motion applications.

Built-in Communication and Networking

The R16CPU features two built-in Gigabit Ethernet ports supporting high-speed industrial network communication. These ports enable connection to Mitsubishi Electric CC-Link IE Field Basic networks, as well as standard TCP/IP and UDP/IP protocols for integration with enterprise systems. The Ethernet ports can be used simultaneously for separate networks, allowing one port dedicated to control network communication while the second port serves HMI and SCADA systems. A standard USB port is provided for programming and peripheral device connection, facilitating direct communication with engineering workstations for program uploads, downloads, and online monitoring. The SD memory card slot supports SDHC cards up to 16 GB for data logging, database storage, and program backup. Extended SRAM cards can be used for expanding soft element and label memory capacity or as hardware security keys for protected program execution.

I/O Capacity and Management

The R16CPU supports up to 4,096 I/O points, providing extensive connectivity for digital and analog input/output modules. I/O control method allows selection between refresh mode for deterministic update times and direct mode for immediate I/O response. The CPU is compatible with the complete range of iQ-R series I/O modules, which feature more advanced capabilities compared to previous MELSEC series. Each I/O module can be used for multiple purposes, reducing deployment and maintenance costs. Input modules feature 16 points per common end, DC24V input voltage, TYP 7.0 mA input current, and configurable response time from 0.1 ms to 70 ms. Interrupt function is available for high-priority event handling, enabling immediate response to critical input signals without waiting for program scan completion. Input and output numbers are clearly marked on module fronts, and LED indicators provide convenient status confirmation of ON and OFF states.

Safety Functional Security and Compliance

The R16CPU conforms to international safety standards EN 13849-1 PL e and ISO 61508 SIL 3 specifications, making it suitable for safety-related applications when paired with compatible safety I/O modules and appropriate configuration. The security architecture supports C/C++ language programming, allowing complex algorithms developed on standard computers to be ported directly to the controller environment. This capability facilitates advanced function development and integration of specialized processing routines into the PLC execution cycle. Database functions are integrated to enable efficient data management, while security features include hardware-based protection against unauthorized access and program copying.

Physical Specifications and Environmental Tolerance

The R16CPU is designed for DIN rail mounting within a standard iQ-R series base unit. Physical dimensions are 106 mm height (base unit mounting side: 98 mm) with width compatible with iQ-R series modular architecture. Current consumption from the 5V DC backplane supply is 0.67 A, with power provided by a dedicated iQ-R series power supply module. Operating temperature range is 0°C to 55°C, with storage temperature from -20°C to 70°C. The fanless design ensures silent operation and reduces maintenance requirements. The CPU is suitable for use in industrial environments with humidity levels of 10% to 90% non-condensing. An LED status indicator panel on the front of the module provides clear visual feedback of power status, run state, error conditions, and communication activity for real-time monitoring and diagnostic purposes.

System Integration and Applications

The R16CPU integrates with the complete iQ-R series product family, including power supply modules, I/O modules, motion modules, network modules, and safety modules. This modular architecture allows system configuration to be tailored precisely to application requirements. The MELSEC iQ-R platform supports high-speed system bus communication between modules, ensuring minimal latency for time-critical control tasks. Typical applications include high-speed packaging machinery, assembly systems, test equipment, material handling systems, semiconductor manufacturing equipment, and automated production lines. The combination of fast processing, extensive memory, and multi CPU capability makes the R16CPU a flexible control platform for both basic IEC 61131-3 programming and complex motion control tasks.