Mitsubishi R16CPU iQ-R Series Programmable Controller CPU Module

The Mitsubishi R16CPU is a standard CPU module within the MELSEC iQ-R series programmable logic controller platform. This high-performance processor is designed for advanced automation and motion control applications requiring fast execution speeds, large program memory, and flexible networking capabilities. The R16CPU supports multi-CPU configurations, allowing up to four CPU modules to operate in parallel within a single iQ-R series base rack, enabling distributed processing for complex control tasks and system redundancy. The CPU is suitable for machine control, process automation, and high-speed production line applications.

Processing Performance and Program Memory

The R16CPU delivers a basic instruction execution time of 0.98 nanoseconds per contact instruction, making it one of the fastest PLC CPUs in the MELSEC iQ-R series. Program capacity is rated at 160K steps (640 KB), providing ample memory for complex ladder logic, structured text, sequential function charts, and function block 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. The 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 without additional programming overhead.

I/O Capacity and Motion Control

The R16CPU supports up to 4,096 local I/O points, with total I/O including remote points up to 16,384 when using CC-Link IE Field network expansion. 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 including digital, analog, temperature control, and specialty function modules. Motion control capabilities include position, speed, torque, and advanced synchronous control functions. The CPU can control up to 64 axes of motion when used with appropriate motion modules and servo drives, making it suitable for multi-axis coordinated motion applications including electronic camming, gearing, and interpolation. Standard CPU models support both standard sequence programs and motion SFC programming for integrated logic and motion control within a single development environment.

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 CC-Link IE Field Basic networks for distributed I/O control, 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. The CPU also supports socket communication for flexible data exchange with IT systems.

Physical Specifications and Installation

The R16CPU is designed for DIN rail mounting within an iQ-R series base unit (rack). 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.

Software Integration and Programming

The R16CPU is programmed using Mitsubishi Electric's MELSOFT GX Works3 software, which provides an integrated development environment for MELSEC iQ-R series controllers. The software supports all IEC 61131-3 programming languages including ladder logic, structured text, function block diagram, and sequential function chart. GX Works3 includes features such as offline simulation, online monitoring, debugging tools, and integrated motion control parameter setting. The CPU supports label programming with structured data types, simplifying program development and maintenance. The engineering software also provides integrated network configuration tools for setting up CC-Link IE Field and Ethernet networks, simplifying the configuration of distributed I/O and connected devices. The software supports project comparison, merge functions, and version control for team development environments.

Applications in Industrial Automation

The R16CPU is suitable for a wide range of industrial automation applications requiring high-speed processing and extensive memory. Typical uses include high-speed packaging machinery with multiple synchronized axes, assembly systems with integrated robotics, semiconductor manufacturing equipment, test and measurement systems, material handling and conveyor control, and process control skids requiring fast analog loop processing. The combination of fast processing, large memory capacity, and built-in Gigabit Ethernet makes the R16CPU applicable for machine builders seeking a high-performance control platform capable of handling both complex logic and data-intensive applications. Industries using the iQ-R platform include automotive manufacturing, food and beverage packaging, pharmaceutical production, electronics assembly, and general industrial automation.

Conclusion

The Mitsubishi R16CPU iQ-R series CPU module delivers 160K steps program capacity, 0.98ns instruction execution, and dual Gigabit Ethernet interfaces for high-performance automation control. Its large I/O capacity, integrated networking, and compatibility with iQ-R series I/O modules support advanced machine and process control applications.