Single-chip Solution for Precise Motor and Servo Control
Engineers designing industrial systems from advanced robotics, automated machines, and motion systems require real-time deterministic operation, high computational performance, as well as network connectivity. These enable overall system improvement while reducing operational costs and saving energy.
The RZ/T1 processor addresses these needs by combining the processing power and real-time architecture to manage tighter control loops, network connectivity to support the latest industrial communication protocols, and hardware integrated high-speed encoder interfaces, all to effectively function as a servo solution on a single chip.
Built around the ARM® Cortex®-R4F core running at up to 600 MHz with double precision floating-point arithmetic, the Renesas RZ/T1 processors readily handle complex control algorithms. Tightly coupled memory (TCM) allows definitive real-time response processing. The CPU gets high-speed access to code and data without passing through cache memory.
- ARM Cortex R4F CPU with Tightly Coupled Memory for real-time performance
- Single/double precision floating point improves control loop arithmetic and reduces memory footprint
- Renesas R-IN Engine supports multiple industrial protocols such as EtherCAT, Profinet, Ethernet/IP, Modbus TCP and more
- Embedded encoder interface supports both incremental and absolute encoders
According to the industry-standard benchmark CoreMark® tests for embedded systems as defined by EEMBC, the RZ/T1 architecture has a CoreMark score of over 1,900 – at least 30% higher than other real-time MPUs targeted for motion control.
Additionally, the RZ/T1 achieves exceptionally low jitter that makes control loops more deterministic and reduces interrupt-handling cycles. Test data shows that jitter is reduced by more than 50%, and task switching is up to 3x faster.
Networking and Servo Drive Capabilities
Industrial automation designs are increasingly implementing network connectivity via deterministic, open-standard networks such as EtherCAT®, EtherNet/IP™ and PROFINET. Traditionally, this functionality has mandated a separate ASIC with dedicated communication functionality. RZ/T1 processors support these leading industrial Ethernet protocols within the same platform.
The Renesas chips also integrate high-speed analog and multiple encoder interfaces capable of handling a wide range of digital encoders, including incremental encoders. The devices also accommodate absolute encoders such as EnDAT and BiSS.
By eliminating the need for external FPGAs or ASICs, RZ/T1 processors significantly reduce component count, board size and system cost.
System Development Solution Kit
To speed up application designs and shorten time to market, Renesas offers the RZ/T1 Solution Kit—a complete HW/SW development solution that supports up to two servomotors in a single platform.
The kit includes an RZ/T1 CPU card and a dual-channel low-voltage inverter with connections for supporting incremental and absolute encoders. The robust inverter has built-in isolation with current-limiting circuits and over-current protection. A very flexible intelligent Motion Utility Tool automatically determines motor wiring and phasing. All it takes to start a motor spinning are a few clicks of a mouse! To aid customization, algorithms are written in source code.
- Multi-axis support
- Position/rev setting
- Windings mapping
- Phase modes
- Kp, Ki, Kd tuning
- FF velocity/acceleration
- Motor commutation profile
- Motion scope in real time
- Channel-selectable zoom-in
Algorithms in source code
- Current control loop
- Position loop and feedback
- Position capture
- Space Vector Modulation (SVM)
- Velocity profile generator
- And more…
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