MPUs support digital encoder interface for AC servo applications

The RZ/T1 Group includes the Arm Cortex-R4 processor with a dual precision floating-point unit (FPU) operating at up to 600MHz, and provides: real time processing, tightly coupled memory, high speed analogue to support dual servo motors, and network connectivity for distributed motion that matches the needs of precise AC servo drive applications.

The RZ/T1 already supports other encoder interfaces including EnDat 2.2, BiSS-C, Tamagawa and A-format. This time, the RZ/T1 newly supports the HIPERFACE DSL digital encoder interface. These digital, bidirectional interfaces provide precise position values from absolute encoders. Instead of using a separate FPGA or ASIC, integrating these encoder interfaces on the RZ/T1 reduces the component count and cuts system costs.

With this expanded functionality, the RZ/T1 now supports most of the encoder interfaces, and with its configurable encoder interface, it simplifies swapping different encoders interfaces from a single device platform.

HIPERFACE DSL is an interface provided by SICK STEGMANN, and uses the familiar RS485 cabling with a transmission rate of 9.375 mega baud rate. The data is transmitted in synchronisation with the drive cycle, and the cable between the drive electronic and feedback system can be up to 100m in length.

Key features of the solution package:
The solution package for HIPERFACE DSL provides all required support to connect the RZ/T1 to corresponding slave devices:

1. Encoder interface configuration data: programmes the configurable encoder interface to operate in HIPERFACE DSL mode and to be able to connect to a corresponding slave device
2. Sample driver code: enables the application programme to communicate with the encoder through a simple API
3. Documentation: API and example programme descriptions are provided in an application note; a user’s manual for the HIPERFACE DSL encoder enables individual modifications and extensions of the given code samples

“The availability of HIPERFACE DSL for the RZ/T1 proliferates the adoption of our powerful encoder technology in the market,” said Clemens Bitsch, Product Manager of HIPERFACE DSL, SICK STEGMANN. “We see the digital encoder evolution as a substantial driver for efficient and cost-optimised systems and as a pre-requisite for the Industry 4.0.”

As a solution provider, Renesas, in collaboration with partners, is committed to providing AC servo solutions that support innovative and future-proven system architectures.